Question

(1) The mean of two numbers is 13. If one of them is 20, find the other.​

Answer 1

◆ Answer -

6 is the other number.

● Explanation -

Let x be the required no.

Given that mean of two number is 13.

Mean = sum of numbers / 2

13 = (20 + x) / 2

13 × 2 = 20 + x

26 = 20 + x

x = 26 - 20

x = 6

Hence, the other number is 6.

Answer 2

Answer: (20+x)/2=13

20+x=26

x=6