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Recent questions tagged discrete-mathematics

0 votes
1 answer
1654
maths
The average of 4 distinct prime numbers a, b, c, d is 35 where a < b < c < d. b and c are equidistant from 34 and; a and b are equidistant from 30 and; c and d are equidistant from 40; a and d are equidistant from 36 . The difference between a and d is?
The average of 4 distinct prime numbers a, b, c, d is 35 where a < b < c < d. b and c are equidistant from 34 and; a and b are equidistant from 30 and; c and d are equidi...
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1 votes
0 answers
1656
# pair of sets
Given that X is a set of n elements. How many pairs of sets (A, B) exist such that A⊆B⊆S? a. 2n b. 2n+1 c. 3n
Given that X is a set of n elements. How many pairs of sets (A, B) exist such that A⊆B⊆S?a. 2nb. 2n+1c. 3n
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0 votes
0 answers
1657
mock test
how they are equivalent
how they are equivalent
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2 votes
1 answer
1658
Function
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2 votes
1 answer
1661
Self doubt Set
True/False $\left \{ \phi \right \} \neq \phi$
True/False$\left \{ \phi \right \} \neq \phi$
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1 votes
0 answers
1670
Combinatorics
Why not 2, why 3 , for example if we take { 1,3} from { 1,3,5,7,9} or {2,4} from { 2,4 ,6 ,8} still with two numbers we can get sum as even..Kindly help thanks :)
Why not 2, why 3 , for example if we take { 1,3} from { 1,3,5,7,9} or {2,4} from { 2,4 ,6 ,8} still with two numbers we can get sum as even..Kindly help thanks :)
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3 votes
1 answer
1671
solve
In how many ways can we distribute 77 apples and 66 oranges among 44 children so that each child gets at least one apple? solve by generating function along with approach thanks
In how many ways can we distribute 77 apples and 66 oranges among 44 children so that each child gets at least one apple? solve by generating function along with approac...
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2 votes
0 answers
1672
solve
There are 4 oranges, 5 apples and 6 mangoes in a basket. In how many ways can a person make a selection when select at least one fruit from each kind? provide approach thanks in advance
There are 4 oranges, 5 apples and 6 mangoes in a basket. In how many ways can a person make a selection when select at least one fruit from each kind? provide approach th...
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4 votes
1 answer
1673
solve by generating function along with approach thanks advance
In how many ways 2 alike apple, 3 alike orange and 4 alike mango can be given to 3 children if each child can have 1 or more than 1 fruits.
In how many ways 2 alike apple, 3 alike orange and 4 alike mango can be given to 3 children if each child can have 1 or more than 1 fruits.
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2 votes
1 answer
1674
Check which one is this
The binary operation defined on a,b∈z such that a*b= min⁡(a,b)then (A,*) is a)monoid b)group c)algebric-structure d)semi group
The binary operation defined on a,b∈z such that a*b= min⁡(a,b)then (A,*) isa)monoidb)groupc)algebric-structured)semi group
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2 votes
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1675
#self_doubt
Express it in terms of logic, here in question i am confused how i use implications, i am unable to distinguish between option a and b .. need help. ..!
Express it in terms of logic, here in question i am confused how i use implications, i am unable to distinguish between option a and b .. need help. ..!
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2 votes
0 answers
1676
Mathematics
A box contains 6 red, 8 green, 10 blue, 12 yellow and 15 white balls. What is the minimum no. of balls we have to choose randomly from the box to ensure that we get 9 balls of same color? How to solve such problems using pigeonhole principle?
A box contains 6 red, 8 green, 10 blue, 12 yellow and 15 white balls. What is the minimum no. of balls we have to choose randomly from the box to ensure that we get 9 bal...
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1 votes
1 answer
1678
permutations and combinations
Find the number of ways to distribute 10 books in 3 shelves. I considered it as an ordered problem which is fully unspecified. So, answer should be 310. But the given answer is 12P2. Where am i going wrong?
Find the number of ways to distribute 10 books in 3 shelves.I considered it as an ordered problem which is fully unspecified. So, answer should be 310. But the given answ...
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