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5 April, 19:00

Most people think babies are equally likely to come as either a boy or a girl. This is not true. Actually, about 51.3% of all babies are boys. If a family has two children (not twins), what is the chance they have one boy and one girl

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  1. 5 April, 21:59
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    0.499662

    Step-by-step explanation:

    Now since 51.3% of all babies are boys, this means that the probability of having a baby boy P (b) = 51.3/100 = 0.513

    Since there are only two options, you are either a boy or a girl. The Probability of having a girl child P (g) = 1 - P (b) = 1 - 0.513 = 0.487

    Now, we proceed to calculate the probability.

    The probability of having one boy and one girl = probability of one boy and one girl or probability of one girl and one boy

    Or in probability means that we have to add the two possibilities together.

    P = (0.513*0.487) + (0.487 * 0.513) = 0.499662
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