Question

Q8
If the mean of five observation x, x+1, X+2, X+3 and x+4 is 15, then find the value of x is
(a) 1
(b) 6
(C) 5
(d) 8​

Answer 1

Answer:

mean = 15

mean = (x + x+1 + x+2 + x+3 + x+4)/ 5

15 = (5x + 10) / 5

75 = 5x + 10

65/5 = x

x = 13