Question

If AM of x, X+2, X+3, X+5,x+7 is 10 than x is equal to

Answer 1

Answer:

Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams.

Step-by-step explanation:

Given that, the meanof the observation x, x+3, x+7 and x+10 is 9.

∴x+x+3+x+5+x+7+x+105=9

⇒5x+25=45

⇒5x=20

⇒x=4

∴ Last three observations are x+5=4+5=9,x+7=4+7=11

and x+10=4+10=14

So, the mean of last three observations =9+11+143=343=1113

Hence, the mean of last three observations is 1113.