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MHT CET 2019 Math Solved Paper
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© examsnet.com
Question : 11
Total: 50
A bag contains 6 white and 4 black balls. Two balls are drawn at random. The probability that they are of the same colour is...........
5
7
1
7
7
15
1
15
Validate
Solution:
Total number of balls = 10.
No. of ways of drawing 2 balls out of
10
=
10
C
2
=
45
No. of ways of drawing 2 white balls out of 6
=
6
C
2
=
15
No. of ways of drawing 2 black balls out of 4
=
4
C
2
=
6
required probability
=
15
+
6
45
=
21
45
=
7
15
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