Question

Michael and Melissa both claim to be earning a C average (70%-79%) in their Latin class. The table below shows their grades:

One of the students is wrong about their average. Which one is wrong? Use the mean and the median given to explain how they are wrong.

Answer 1

⁷⁰¿⁸⁷⁵⁹³⁰⁰³⁷

583

Explanation:

7393 he and

Answer 2

Answer: Michael's median

Explanation:

Michael's grades mean (%) = data's sum(80+76+...)/total data (7)

80+76+73+70+40+25+10/7

374/7

53.4% (right)

Michael's grades median (%) = (data's sum + 1)/2

(374 + 1)/2

data - 187 and data - 188

= 73% (wrong)

Melissa grades mean (%) = data's sum(88+83+...)/total data (7)

503/7

71.85% = 71.9% (right)

Melissa grades median (%) = (data's sum + 1)/2

(503+1)/2

504/2

data - 252

= 70% (right)