Question

The mean of six observations x, x+2, x+5, x+7, x+10, x+12 is 11. Then mean of first 4 observations is______

Answer 1

Step-by-step explanation:

mean = sum of values/ no of values

11 = 6x+36 / 6 =6(x+6)/6 = x+6

x=11-6 =5