Child Probability

Biology Level 1

A couple has 5 biological children. All of them are sons. If the woman now gives birth to a sixth child, what is the probability that the sixth child will be a son?

Note: A version of this question appeared on the 1999 AP Biology Exam.

\[\frac{1}{5}\] \[\frac{1}{2}\] \[\frac{1}{6}\] \[\frac{1}{64}\] \[\frac{2}{3}\] \[\frac{5}{6}\]

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