Question

The mean of numbers 20, 30, 40, x, x + 10, 70, 80, 90 is 110. Find the missing numbers.​

Answer 1

hlo mate ✌️

Given :

mean of 20, 30, 40, x, x + 10, 70, 80, 90 = 110.

According to the condition:

-->( 20 + 30+40 +x+x+10+70 +80+90)/8

--> (90 + 2x + 160 + 90)/8

--> (180 + 2x + 160) /8

--> 340 + 2x / 8 = 110

340 + 2x = 880

2x = 540

x = 275

Hope it helps ❣️❣️

Answer 2

Answer:

270,280

Step-by-step explanation:

Given:

The mean of numbers 20, 30, 40, x, x + 10, 70, 80, 90 is 110.

To Find:

Find missing numbers.

To Solve:

Add the items together.

20 + 30 + 40 + x + x + 10 + 70 + 80 + 90.

Divide the total by the number of items.

(20 + 30 + 40 + x + x + 10 + 70 + 80 + 90)/8 = 110

==> 340 + 2x/8 = 110

==> 340 + 2x = 880

==> x = 270

Then,

x + 10 = 280

Result:

Missing numbers are 270 and 280.