Question

The mean of 3, 6, 7, 5, x, 8, 10, 13 is 56. Find the value of x.
The mean of 5, 10, x + 1, 2x + 1, 2x - 3, x + 6, is 20. Find the value of x.​

Answer 1

Answer:

396 and 16.666

Step-by-step explanation:

Mean=(3+6+7+5+x+8+10+13)/8

56=(52+x)/8

448=52+x

x=396

Mean=(5+10+x+1+2x+1+2x-3+x+6)/6

20=(20+6x)/6

120=20+6x

6x=120-20

6x=100

x=100/6=16.666