475 views
0 votes
0 votes
If 6 out of 10 people have their birthday in the 4 months of the year between February and May inclusive,then What is the probability is the next person has also his or her birthday in this 4 months?

2 Answers

1 votes
1 votes
Selecting 4 months out of 12 months = 4/12

Now already 6 people we have taken

Among last 4 people we have to select 1 people=1/4

So probability is 4/12*1/4=1/12
0 votes
0 votes
i think

There are 12 months in a year

Now they want a child may have birthday between Feb to may (both inclusive)= Feb , march , april ,may = 4/12

Now if 6 person out of 10 have there bday within this month then 6/10

But now they want even next person (all 7 )must have there bday so it will be 7/10

therefore for all 7 person to have there bday bewteen month may to feb is 4/12*7/10=7/30
reshown by

Related questions

5 votes
5 votes
2 answers
3
radha gogia asked Dec 21, 2015
720 views
52 cards are equally given to 4 players a,b,c,d. a and b have together total 8 spades among them. Find probability that c has 3 spades out of remaining 5.In this ques , s...