Question

if the mean of five observations x,x+2,x+4,x+6,x+8, is 13 then find the value of x

Answer 1

(x+ x +2 + ..x+8)/5= 13

20 + 5x = 65

5x = 45

X = 9

Answer 2

Answer:

No. of observation = 5

sum of data = x +x + 2+ x+4 +x +6+ x+ 8 = 5x + 20

than,

mean = sum of data / no. of data

13 = 5x + 20 / 5

65 = 5x + 20

45 = 5x

x = 9 answer

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