02-07-2020
Mathematics

contestada

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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gilbertazavedo72 gilbertazavedo72

02-07-2020

Answer: Average = 72

Step-by-step explanation:

Average of 90 nos. = 60

Total score = 90 x 60 = 5400

Average score of 60 nos is 90

Total score = 60 x 90 = 5400

Average of all nos

= (5400 + 5400) / 150 = 72

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