Question

brooke has scores of 84, 72, 90, 95, and 87 on her first five quizzes. after taking the sixth quiz, brookes mean score increased. which could be brookes sixth quiz score? select three options. 85 90 83 86 92

Explanation:

Step1: Calculate the mean of first five scores

$\text{Mean}_1=\frac{84 + 72+90 + 95+87}{5}=\frac{428}{5}=85.6$

Step2: Determine the condition for the sixth - score

For the mean to increase after the sixth quiz, the sixth - score must be greater than $85.6$.

Answer:

B. 90, D. 86, F. 92