Question

8. Find the mean of 25 numbers if the mean of 15 of them is 18 and the
mean of the remaining numbers is 13.
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Answer 1

Step-by-step explanation:

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Answer 2

Answer:

(18+13)/2=16.5

Step-by-step explanation:

means of first 15 numbers is 18

and mean of last 10 numbers is 13

so mean of all 25 numbers is average of 18 and 13