If the mean of 2, 9, x+6, 2x+3, 5, 10, 5 is 7, then the value of x is:... | MCQ 1m | Maths | SuperPadhai

Statistics > Question

MCQ1 markYear: 2025EasyCBSE Class 10

statisticsmean

Question

If the mean of

2, 9, x + 6, 2 x + 3, 5, 10, 5

is 7, then the value of

x

is:

Solution

1

Mean

= \frac{2 + 9 + ( x + 6 ) + ( 2 x + 3 ) + 5 + 10 + 5}{7} = 7

.

\frac{40 + 3 x}{7} = 7 \Rightarrow 40 + 3 x = 49 \Rightarrow 3 x = 9 \Rightarrow x = 3

.

+1 mark

Practice this question interactively with step-by-step AI feedback

Sign up for SuperPadhai