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

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MCQ1 markYear: 2024EasyCBSE Class 10

statisticsmean

Question

For the data

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

; if the mean is 7, then the value of

x

is:

Solution

1

Mean

= \frac{2 + 9 + x + 6 + 2 x + 3 + 5 + 10 + 5}{7} = 7 \Rightarrow 40 + 3 x = 49 \Rightarrow x = 3

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