The mean monthly salary of 10 people is ₹ 2790 . One more person whose monthly salary is ₹ 4000 has also been taken into consideration. Find the mean monthly salary of all the 11 people

₹ 3900

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₹ 2900

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₹ 4900

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The average remains the same

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Solution

The correct option is B
₹ 2900

Mean monthly salary of 10 people = ₹ 2790

$\Rightarrow$ Total monthly salary of 10 people = 2790 x 10 = ₹ 27900

On adding the salary of the 11th person

Total monthly salary of 11 people = 27900 + 4000 = ₹ 31,900

$\Rightarrow$ Average Monthly salary = $\frac{31, 900}{11}$ = ₹ 2900

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