T3W9 TS Q22 – Selective High School

In a class of 32 students, 50% of the pupils have black eyes, and 25% have blue eyes. Of these students, a third are female and a quarter have brown hair.

Which of the following is definitely true?

At least 5 of the female students have blue eyes and brown hair. Some of the female students must have blue eyes. Some of the male students must have black eyes. At least 5 of the male students have brown hair and black eyes.

Are you sure you want to leave?

Which of the following is definitely true?