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There are 11 boys in a family. Youngest child is a boy. What is the probability of all are boys?
Read Solution (Total 4)
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- 11 boys,given youngest is boy
probability
boy or girl (1/2)
remaining 10
so (1/2)^10=1/1024
answer is(1/1024) - 12 years agoHelpfull: Yes(29) No(6)
- sorry frnds...in the Question if 11 boys is replaced with childens then ans is 1/2^10....for this Question ans is 1..
- 12 years agoHelpfull: Yes(21) No(3)
- remaining childrens r 10,1 st child prob=1/2 nd 2 nd=1/2......
ans is 1/2^10 - 12 years agoHelpfull: Yes(1) No(6)
- here boys are repalced by children so so given youngest child is boy so remaining 10 childrens may be boys or girls so to be boys 1/2^10 here 1 is for yongest child boy
- 9 years agoHelpfull: Yes(0) No(0)
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