Question

11. There are 5 green 7 red balls. Two balls are selected one by one without
replacement. Find the probability that first is green and second is red.
(a) 32/126
(b) 31/134
(c) 35/132
(65421144​

Answer 1

Step-by-step explanation:

There are total 5+7=12 balls

We can draw 2 balls out of 12 in [Math Processing Error] no. of ways.

Further, out of 5 green balls, 1 can be drawn in no.of ways

Similarly, out of 7 red balls,1 can be drawn inno. of ways.

Hence, the probability of getting exactly 1 green and 1 red ball on drawing 2 balls=