Question

Elaine gets quiz grades of 69, 78, and 62. She gets a 68 on her final exam. What is the weighted mean if the quizzes each count for 10% of the final exam counts for 70% of the final grade?

Answer 1

Weighted mean of all the scores = 68.5%

Step-by-step explanation

We are asked to find the weighted mean given that each of the quizes account for 10% each and the exam accounts for 70%.

To do this, we will express each of the quiz scores over 10 and the exam score over 70.

Quiz 1

Score = 69

(69/100) × 10 = 6.9

Quiz 2

Score = 78

(78/100) × 10 = 7.8

Quiz 3

Score = 62

(62/100) × 10 = 6.2

Exam

Score = 68

(68/100) × 70 = 47.6

So, the total weighted scores of the quizes sum up to

6.9 + 7.8 + 6.2 = 20.9

Exam score = 47.6

Weighted mean of all the scores = 20.9 + 47.6 = 68.5%

Hope this Helps!!!