which number is closest to the first quartile? 10 40 90

Answer:

B. 40

Explanation:

Step1: Recall quartile in box - plot

In a box - plot, the left - hand side of the box represents the first quartile ($Q_1$).

Step2: Locate position on plot

The left - hand side of the box in the given box - plot is around 40. So the number closest to the first quartile is 40.