IB Statistics and Probability Problem 009

The eye colours of 97 students are given in the following table.

image essential to understanding the question

A student is chosen at random.

  1. Write down the probability that this student is a boy.
  2. Write down the probability that this student has green eyes, given that the student is a girl.
  3. Find the probability that this student has green eyes or is a boy.
Published by Annie Bernatchez in «Statistics and Probability». Key Words: IB, question