Question

5. Average of 2 numbers is 17. If 1 number is
21. find the other number.
(1) 7 (2) 8
(3) 12
(4) 13​

Answer 1

Answer:

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Step-by-step explanation:

Average of numbers = Sum of the numbers / Total number of numbers

Average = 17

One number = 21

17 = 21 + x / 2

34 = 21 + x

x = 13

Answer 2

Answer:

13

Step-by-step explanation:

Let the number be x.

17 = (21 + x) ÷ 2

17 × 2 = 21 + x

34 = 21 + x

34 - 21 = x

13 = x