Question

A class of 30 students appeared in a test. The average score of 12 students is 80, and that of the rest is 75. What is the average score of the class?

• A. 56
• B. 67
• C. 87
• D. 77

Answer 1

Answer:

D. 77

Read Explanation:

The average score of 12 students is 80

sum=12*80=960

rest is 75 sum=18*75=1350

avarage=(960+1350)/30=77

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