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8 February, 03:51

The average (mean) of 90 numbers is 60, and the average of 60 numbers is 90. What is the average of all the numbers?

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  1. 8 February, 04:10
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    Answer: 72

    Step-by-step explanation:

    Total score of 90 nos. 90 x 60 = 5400

    Total score of 60 nos. 60 x 90 = 5400

    Total score of 150 nos

    = 10800 / 150 = 72
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