Question

the average of 5numbers is 15and the average of another 5numbers is 18find the average of 10numbers together​

Answer 1

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

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Answer 2

Step-by-step explanation:

average = 15+18/2 = 16.5

hope this helps