Find the mean of these set of numbers – 100, 1050, 320, 600 and 150.

444

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333

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222

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440

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Solution

The correct option is A 444
The mean (or average) of a number of observations is the sum of the values of all the observations divided by the total number of observations.

Mean = $\frac{T o t a l s u m o f o b s e r v a t i o n}{t o t a l n u m b e r o f o b s e r v a t i o n s}$
First add all the numbers.
100 + 1050 + 320 + 600 + 150 = 2220.
Then divide by 5 (the number of data provided).
Mean = $\frac{2220}{5}$ = 444

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