Question

A bag contains $5$ white balls, $7$ red balls, $4$ black balls and $2$ blue balls is drawn at random from the bag, find the probability that the picked ball is either white or blue ball.

• A. $\frac{7}{11}$
• B. $\frac{2}{5}$
• C. $\frac{7}{18}$
• D. None of these

Answer 1

The correct option is C $\frac{7}{18}$

The total number of balls in the bag is $5+7+4+2=18$balls

The no .of Favourable outcomes are $5$ (White ) + $2$ (Black)=$7$

So the probability is given by $\frac{7}{18}$