Question

In a bag there are 4 white 4 red and 2 green ball . two balls are drawn at random. what is the probability that atleast one ball is of green colour

Answer 1

We know that
P(e)=No. Of favorable outcomes /Total number of outcomes
Here favourable outcomes are 2 and total outcomes are 10
Therefore P (e)=2/10 or 1/5

Answer 2

$0.5$
total no =10
atleast one ball is of green colour=2
probability=1/2=0.5