SOLUTION: A family has five children. The probability of having a girl is 1/2.what is the probability of having at least 3 boys?
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Question 998248: A family has five children. The probability of having a girl is 1/2.what is the probability of having at least 3 boys?
Answer by fractalier(6550) (Show Source): You can put this solution on YOUR website!
Well, one way to do this is to look at row 5 of Pascal's Triangle...
The numbers represent the number of chances out of 32 possible ways to have 5 kids...
1,5,10,10,5,1
Thus there is 1/32 to have 5 boys, 5/32 to have 4 boys, and 10/32 chance to have three boys...adding the chances together...you get
16/32 = 1/2 to have at least three boys.
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