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A bag contarns 6 white and 4 black balls...

A bag contarns 6 white and 4 black balls. Two balls are drawn at random. The probability that they are of the same colour is ......

A

`5/7`

B

`1/7`

C

`7/15`

D

`1/15`

Text Solution

Verified by Experts

The correct Answer is:
C
Total number of balls=10
Required probability=`(""^(6)C_(2)+""^(4)C_(2))/(""^(10)C_(2))`
`=(15+6)/45=21/45=7/15`
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