Question

1. based on the venn diagram below, how many students own have a sister, but not a brother?

Explanation:

Step1: Understand the Venn diagram

The yellow circle represents students with a brother, the blue circle represents students with a sister. The overlapping part (green) is students with both.

Step2: Find students with a sister but not a brother

We look at the part of the sister (blue) circle that doesn't overlap with the brother (yellow) circle. That value is \(13\).

Answer:

\(13\)