Question

if the average is 102 of 9 even numbers then what's the difference of first and last number​

Answer 1

Answer:

Average is 102

Step-by-step explanation:

1st 9 even no. are - 0,2,4,6,8,10,12,14,16.

Now,the average is 102=0+2+4+6+8+10+12+14+16

1 9

now cross multiply 102 with 9 and ramaining other all first 9 even no. with 1

Then, 102×9= 72×1

218 = 72

The difference between the 1st and last number is 16-0 = 16..

Now your question is clear..