the average height of 74 students in a class is 168 cm out of which 42 student

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the average height of 74 students in a class is 168 cm out of which 42 students had an average height of 170 cm. find the average height of the remaining 32 students.

Options:

A . 165

B . 145

C . 175

D . 155

Answer: Option A
Explanation :

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Question 3. the average mark of 70 students in a class is 80. out of these 70 students, if the average mark of 40 students is 75, ....what is the average mark of the remaining 30 students?

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