If the mean of `x+1, x +12, 2x+3` and `3x +5` is 21, then the value of x is:

A

12

B

10

C

8

D

9

Verified by Experts

The correct Answer is:

D

Similar Questions

Explore conceptually related problems

If the mean of x + 2, 2x + 3, 3x + 4 and 4x + 5 is x + 2, then find the value of x.

The mean of 6, 6+2x , 5 and 8 and 8+3x is 20 . Find the value of x .

If 3x + 5y = 21 and 2x +3y = 13 , then find the values of x and y .

If (3x + 4)^2 + (3x - 2)^2 = (6x + 5)(3x - 2) + 12 , then the value of x is:

If |{:( 2x, x + 3),(2 (x +1), x +1):}| = |{:(3,3),( 1, 5):}|, then the value of x is :

Given that (5x - 3)^3 + (2x + 5)^3 + 27(4- 3x)^3 = 9(3 - 5x)(2x + 5)(3x - 4) , then the value of (2x + 1) is:

The mean of X_(1),x_(2) ,………, x_(n) is 10 ,then the mean of 5x_(1),5x_(21) ….. 5_(x)n is: