Question

A bag has 4 red balls and 2 yellow balls.(The balls are identical in all respect other than colour.) A ball is drawn from the bag without looking into the bag.The probability of getting a red ball is _______ .

• A. $\frac{1}{2}$
• B. $\frac{2}{3}$
• C. $\frac{1}{4}$
• D. $\frac{1}{5}$

Answer 1

The correct option is B $\frac{2}{3}$

Probability of an event $P\left(E\right)=\frac{No.ofFavourableOutcomes}{TotalNo.ofOutcomes}$

Here,

Favourable Outcomes $=$ Getting a Red ball

Number of Favourable Outcomes $=$ Number of Red Balls $=4$

Total Number of Outcomes $=6$ $=$ Total Number of Balls

$\Rightarrow P\left(E\right)=\frac{4}{6}=\frac{2}{3}$