A bag contains 30 white ball and 10 red balls | Statistics

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JEE MAIN 2019

11-01-2019 S2

Question

A bag contains 30 white ball and 10 red balls. 16 balls are drawn one by one randomly from the bag with replacement. If $X$ be the number of white balls drawn, then $\left(\frac{\text { mean of } X}{\text { Stan dard deviation of } X}\right)$ is equal to:

Select the correct option:

A

$3 \sqrt{2}$

B

$4 \sqrt{3}$

C

$\frac{4 \sqrt{3}}{3}$

D

4

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

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