The mean of 15 numbers is 18. If one number is included their mean is 19 find the included number
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Answered by
12
Clearly, the sum of all the numbers = 15 × 18 = 270
Now, sum of all the numbers including the extra number = 16 × 19 = 304
Hence, the number which is included is 304 - 270 = 34
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Answered by
1
answer:
34
step by step explanation :
The mean of 15 number =18
the sum of 15 number = 15×18 = 270
the sum of extra number included = 16×19 = 304
included number = 304-270 = 34
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