Question

A basket contains 3 blue 5 black and 3 red balls if two balls are drawn at random what is the probability that none of them is blue

Answer 1

Here the total number of balls in the basket is
5+3+3=11
Here two are selected in random
therefore total possibility is equal to N is equal to (11C2)
=55
and the favourable outcome are (8C2)
{5+3=8 red and black balls}
=28
a for probability is equal to 28/55