a bag contains 3 red chips,4 blue chips and 3 green chips. John draws a chip out of the bag.what is the probability that he gets a green chips or a blue chips?

a. 3/10

b. 4/10 or 2/5

c. 6/10 or 3/5

• d. 7/10

Solution:

There are 3 red chips, 4 blue chips and 3 green chips in the bag.

The number of chips = 3 + 4 + 3 = 10

The number of green chips and blue chips = 3 + 4 = 7

So the probability of getting green a chip or a blue chip =

P= 7/10 ( classical subschem)