Question

Average of 4 numbers is 16. If three numbers are 15, 20 and 23. Find the forth
number ?

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Answer 1

Answer:

let the number be X

15+20+23+X/4 = 16

58+X = 16×4

X= 64-58

X= 6

Answer 2

Answer:

6

Step-by-step explanation:

(15+20+23+x)/4 = 16

(58 + x)/4 = 16

14.5 + x/4 = 16

x/4 = 16 - 14.5

x/4 = 1.5

x = 1.5*4

x = 6

Verify:

(15+20+23+6)/4

64/4

16