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}