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A class of 40 students took a math test. 18 of the students had a weighted average of 80. the other students had a weighted average of 70. what is the average score of the whole class?
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A class of 40 students took a math test. 18 of the students had a weighted average of 80. the other students had a weighted average of 70. what is the average score of the whole class?

User Johnny Bones
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18 students scored 80%
22 students scored 70%

((18 × .8) + (22 × .7)) ÷ .4
(14.4 + 15.4) ÷ .4
(29.8) ÷ .4
74.5

The average score of the whole class was 74.5
User Sfx
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