Math, asked by monkirudhar, 2 months ago

the average of four number is 20.if three number are 18,19 and 15.what is the fourth number?q

Answers

Answered by halivorfrancis

0

Answer:

28

Step-by-step explanation:

Let the fourth number = x

SO

18 + 19 + 15 + x / 4 = 20

52 + x / 4 = 20

L.C.M = 4

52 + x = 80

x = 80 -52

x = 28

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