Mathematics

A bag contains 3 red, 4 black and 5 green identical balls. Two balls are…

A bag contains 3 red, 4 black and 5 green identical balls. Two balls are picked at random, one after the other without replacement. Find the probability that one is red and the other is green
  • A.
    2/3
  • B.
    5/11
  • C.
    5/22
  • D.
    5/24
  • E.
    5/48
Correct Answer: Option C
Explanation

Total balls = 12
RG or GR

3/12

x

5/11

+

5/12

x

3/11
5/44

+

5/44

=

10/44

=

5/22