mean and percentiles

Question

 Mariam’s first 5 quiz scores are 95, 88, 97, 82, 91.

What score does Mariam need on her 6^th quiz to get a median score of 90?

               

Answer 1

right now, with 5 scores, she has 91 median

if she got an 89, then she'd have a median of 90 for 6 scores

(91+89)/2 = 90 = average of 2 middle scores = median for an even number of scores