Question 72
The average of 10 numbers is 37. If each number is decreased by 2, what will be the new average?
Solution
The average of 10 numbers is 37.
Sum of 10 numbers initially = $$37\times10$$ = 370
If each number is decreased by 2.
new average = $$\frac{370-2\times\ 10}{10}$$
= $$\frac{370-20}{10}$$
= $$\frac{350}{10}$$
= 35
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