Question

There are 5 green, 6 black and 7 white balls in a bag. A ball is drawn at random from the bag. Find the probability that it is not white.

Answer 1

Given,
Number of green balls $=5$
Number of black balls $=6$
Number of white balls $=7$
Total number of outcomes $=5+6+7=18$
There are $18$ balls out of which $11$ are not white.
$\Rightarrow$ Number of favourable outcomes$=11$

$\text{Probability of an event, P(E)}=\frac{\text{Number of favourable outcomes}}{\text{Total number of outcomes}}$
$\Rightarrow$ P( ball drawn is not white) = $\frac{11}{18}$

$\therefore$ Probability that the ball drawn is not white is $\frac{11}{18}$ .