A group of 210 students appeared in some test. The mean - Practice (English)

Basics Mathematical Reasoning And AptitudeHard

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A group of 210 students appeared in some test. The mean of 1/3rd of students is found to be 60. The mean of the remaining students is found to be 78. The mean of the whole group will be:

Correct Answer: B — 72

Explanation:

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