Question

A bag contains 6 white and 4 black balls .2 balls are drawn at random. Find the probability that they are of same colour.

A) 1/2
B) 7/15
C) 8/15
D) 1/9

Answer 1

Answer:

(B)7/15

Step-by-step explanation:

total no of balls=10

no. of possibilities of drawing 2balls=10c2

no. of possibilities of drawing 2same coloured balls=4c2+6c2

so,

p(2same coloured balls)=4c2+6c2/10c2

=42/90

=7/15