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
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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
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