Question

If thc mcan of thc obscrvations:
x,x+3, x + 5,x+7, x + 10
is 9, the mean of the last three observations ?​

Answer 1

Step-by-step explanation:

Mean of x,x+3,x+5,x+7,x+10=9

Sum of the terms =5x+25

Mean = 55x+25=9

x+5=9

x=4

Last three observations are 9,11,14

Mean =39+11+14=1131