Question

the mean of 5 observations : x , x+4 , x+8 , x+12 , x+16 ,is 15 find x​

Answer 1

Answer:

x = 4

Step-by-step explanation:

sum of all = 5x + 55

mean of that = 5x + 55 / 5 = 15

x + 11 = 15

x =15-11

x=4

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