1.

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`

Answer» Correct Answer - C
Total number of balls=10
Required probability=`(""^(6)C_(2)+""^(4)C_(2))/(""^(10)C_(2))`
`=(15+6)/45=21/45=7/15`


Discussion

No Comment Found

Related InterviewSolutions