Two balls are to be drawn from a bag containing 8 grey and 3 blue balls. Find the chance that they will both be blue.

\frac{1}{5}

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\frac{3}{55}

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\frac{11}{15}

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\frac{14}{45}

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Solution

The correct option is B $\frac{3}{55}$
8 grey and 3 blue balls
probability that all are black $= \frac{^{3} C_{2}}{^{11} C_{2}} = \frac{3}{55}$

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