Math, asked by nkalyan530, 5 months ago

the avaerage of 17 numers is 15.If the average of first 9 numbers is 14 and that of last number is 16 find the middle number ​

Answers

Answered by Anonymous
8

ANSWER

Average of 15 numbers = 18

Sum of 15 numbers = 15×18 = 270

Average of first 8 numbers =19

Sum of first 8 numbers = 19×8 =152

Average of last 8 numbers =17

Sum of last 8 numbers =17×8 =136

8th number = Sum of first 8 +Sum of last 8 - total sum

=152+136−270

=18

#khushu☺️

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