A bag contains 2 white balls, 3 pink balls and 2 black balls. 2 balls are drawn randomly. What is the probability that there is no black balls ?

8/21

10/21

1/8

3/5

6/11

Option B Required = 5C2 = 5*4/2 = 10 total = 7C2 = 7 * 6 / 2 = 21 probability = 10/21

When two coins are tossed simultaneously, then find the probability of getting at least one tail.

5

3

3/4

1/4

2/5

Option C Required = ( 1 head , 1 tail ) , ( 2 tails) = (2C1) + (2C2) = 2 + 1 = 3 total = 2^2 = 4 probability = 3/4

A bag contains 4 red balls, 2 blue balls and 2 green balls . If two balls are drawn randomly from the bag , then find the probability of getting both balls of different color.

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