Question

Mean of the observations x,x+3,x+5,x+7 and x+10 is 9 find mean of tge last 3 observations

Answer 1

x+x+3+x+5+x+7+x+10÷5=9

25÷5+5x = 9

5+5x =9

5x=4

x=4÷5

Find it and put the value of x in observations and find mean of last three observations

Thank you for points............