# If Ram draw a ball from a bag containing 4 white balls and 6 black balls, what is the probability of getting a white ball?

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If Ram draw a ball from a bag containing 4 white balls and 6 black balls, what is the probability of getting a white ball?
1. 2/5
2. 3/5
3. 0
4. 1

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Correct Answer - Option 1 : 2/5

Concept:

If S is a sample space and E is a favourable event then the probability of E is given by:

$\rm P(E)=\frac{n(E)}{n(S)}$

Calculation:

Total balls in bag = 4 + 6 = 10 balls

A black ball can be drawn in 4 ways out of 10 possible outcomes.

probability of getting a white ball = P(W) = $\frac{4}{{10}}$

$\frac 2 5$