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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.

Michael and Melissa both claim to be earning a C average (70%-79%) in their Latin-example-1
User Nowshath
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2 Answers

7 votes

Answer:

⁷⁰¿⁸⁷⁵⁹³⁰⁰³⁷

583

Explanation:

7393 he and

User Cay
by
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4 votes

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)

User Sergey Sheleg
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