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Recent questions tagged probability

1 votes
1 answer
902
Probability posion distribtuion
the tailors in the stitching shop on an average stitches 3 shorts in an hour,stitching has a poison distribution.During a particular hour ,what is the probability that number of shirts stitched are 5 or more? a) .8571 b.) .8152 c.) .1848 d.).1439
the tailors in the stitching shop on an average stitches 3 shorts in an hour,stitching has a poison distribution.During a particular hour ,what is the probability that nu...
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2 votes
1 answer
906
Probability
P( A union B)=.6 P( A intersection B)=.25 Find P(A`) +P(B`) ? where P(A`) means probability of A complement.
P( A union B)=.6P( A intersection B)=.25Find P(A ) +P(B ) ? where P(A ) means probability of A complement.
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1 votes
1 answer
907
IISc PhD
A bag contains Red Balls and Black Balls. Two balls are drawn without replacement. The probability that both the balls drawn are red is 1/2. What is the minimum number of Red and Black Balls for which this probability is satisfied?
A bag contains Red Balls and Black Balls. Two balls are drawn without replacement. The probability that both the balls drawn are red is 1/2. What is the minimum number of...
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2 votes
1 answer
909
sheldon ross, chapter 2, question 17
If 8 rooks are randomly placed on a chessboard, compute the probability that none of the rooks can caputre any of the others. That is compute the probability that no row or file contains more than one rook.
If 8 rooks are randomly placed on a chessboard, compute the probability that none of the rooks can caputre any of the others. That is compute the probability that no row ...
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1 votes
2 answers
910
Probability of dice
If 4 dice tossed together , what is the probability of sum of these dice will be exactly 20? (want to see some shortcut procedure)
If 4 dice tossed together , what is the probability of sum of these dice will be exactly 20? (want to see some shortcut procedure)
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1 votes
1 answer
916
Probability
in a game of bridge the entire deck of 52 cards is dealt out to 4 players.What is the probability that i)one of the players receive all 13 spades ii )each player receives one ace?
in a game of bridge the entire deck of 52 cards is dealt out to 4 players.What is the probability that i)one of the players receive all 13 spadesii )each player receives...
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1 votes
1 answer
919
Ravi asked his neighbor to water a delicate plant while he is away.
Ravi asked his neighbor to water a delicate plant while he is away. Without water, the plant would die with probability $4/5$ and with water, it would die with probability $3/20$ ... forgot to water the plant? (A) $4/5$ (B) $27/43$ (C) $16/43$ (D) $2/25$
Ravi asked his neighbor to water a delicate plant while he is away. Without water, the plant would die with probability $4/5$ and with water, it would die with probabilit...
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0 votes
1 answer
920
probability
If from each box of the three boxes containing $3$ white and $3$ black,$2$ white and $2$ black,$1$ white and $3$ black,one ball is drawn at random ,then the probability that $2$ white and $1$ black ball will be drawn ?
If from each box of the three boxes containing $3$ white and $3$ black,$2$ white and $2$ black,$1$ white and $3$ black,one ball is drawn at random ,then the probability t...
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2 votes
1 answer
921
probability
There are $N$ persons sitting in a row. Two of them are selected at random.The probability that two selected persons are not together ?
There are $N$ persons sitting in a row. Two of them are selected at random.The probability that two selected persons are not together ?
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1 votes
2 answers
922
probability
There are four machines and it is known that exactly two of them are faulty .They are tested one by one in a random order till both the faulty machines are identified ,then the probability that only two tests are needed ?
There are four machines and it is known that exactly two of them are faulty .They are tested one by one in a random order till both the faulty machines are identified ,th...
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1 votes
2 answers
924
ISRO 2014- probability [EE]
A student is to answer 10 out of 13 questions in an examination such that he must choose at least 4 from the first five questions. The number of choices available to him is (A) 140 (B) 196 (C) 280 (D) 346
A student is to answer 10 out of 13 questions in an examination such that he must choose at least 4 from the first five questions. The number of choices available to him ...
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1 votes
1 answer
925
ISRO 2013- probability [EE]
Ten percent of screws produced in a certain factory turn out to be defective. Find the probability that in a sample of 10 screws chosen at random, exactly two will be defective. a) 0.2 b) 0.25 c) 0.8 d) 0.3 79.
Ten percent of screws produced in a certain factory turn out to be defective. Find the probability that in a sample of 10 screws chosen at random, exactly two will be def...
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0 votes
2 answers
926
ISRO 2013 Probability [EE]
An urn contains 5 black and 5 white balls. The probability of drawing two balls of the same colour a) 2/9 b) 4/9 c) 1/9 d) 5/9
An urn contains 5 black and 5 white balls. The probability of drawing two balls of the same coloura) 2/9b) 4/9c) 1/9d) 5/9
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0 votes
1 answer
927
ISRO 2013- Probability/Leap year [Mech]
Chance that a leap year selected at random will contain 53 Sundays is (a) 3/7 (b) 7/2 (c) 7/3 (d) 2/7
Chance that a leap year selected at random will contain 53 Sundays is(a) 3/7(b) 7/2(c) 7/3(d) 2/7
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0 votes
2 answers
928
ISRO 2013- Probability [Mech]
If the probability for A to fail an examination is 0.2 and that for B is 0.3, then probability that either A of B fail is (a) 0.5 (b) 0.06 (c) 0.44 (d) 0.38
If the probability for A to fail an examination is 0.2 and that for B is 0.3, then probability that either A of B fail is(a) 0.5(b) 0.06(c) 0.44(d) 0.38
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0 votes
3 answers
929
ISRO 2014- Probability [Mech]
A purse contains 4 copper coins and 3 silver coins. A second purse contains 6 copper coins and 4 silver coins. A purse is chosen randomly and a coin is taken out of it. What is the probability that it is a copper coin? a) 70/82 b) 35/70 c) 41/82 d) 41/70
A purse contains 4 copper coins and 3 silver coins. A second purse contains 6 copper coins and 4 silver coins. A purse is chosen randomly and a coin is taken out of it. W...
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1 votes
1 answer
930
ISRO 2015- probability [Mech]
The probability that a teacher will give an unannounced test during any class is 1/5. If a student is absent twice, then probability that misses at least one test is (a) 24/25 (b) 16/25 (c) 7/25 (d) 9/25
The probability that a teacher will give an unannounced test during any class is 1/5. If a student is absent twice, then probability that misses at least one test is(a) 2...
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