Question

A class of 25 students took a

science test. 10 students had
an average score of 80. The
other students had an
average score of 60. What is
the average score of the
whole class?

Answer 1

the average score is 68.

Explanation:

there are 10 with 80 = 10 * 80 = 800

and the others with = 15 * 60 = 900

800 + 900 = 1700 / 25 = 68.

Answer 2

90 is my answer when I add