Answered

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A class of 30 students took a geography test. 26 students had an average score of 65%
The remaining students were sick and took the test the following week. They had an average score of 77%. What was the average score for the whole class?

Sagot :

Gomezpidn

Answer:

66.6 not 79.80 :)

Analysis:

Let's say the score is 100 out of 100

The average grade of 26 students was 65

The remaining 4 students had an average of 77.

so:

77 × 4 = 308 (the total score of the 4 students)

65 × 26 = 1,690 (the 26 students)

then:

308 + 1690

30 = 66.6 (this is the average score of the whole class)