2 Write whether the event is certain likely unlikely or impo

2. Write whether the event is certain, likely, unlikely or impossible.

A glass jar contains 30 marbles. The jar has yellow and blue marbles. There are 7 blue marbles.Describe the probability of a green marble.

3. There are 3 pink, 3 violet, 4 yellow, and 2 brown marbles in a hat. You pick 2 marbles from the hat. Marbles are not returned after they have been drawn. Find the probability that the first marble is violet and the second marble is pink.

Solution

1.

12C7 = 12!/(7!(12-7)!) = 12!/(7!5!) = 792 [answer]

2.

IMPOSSIBLE. It only has yellow and blue marbles, so it\'s impossible to draw a green.

3.

P(violet then pink) = (3/12)*(3/11) = 3/44 [ANSWER]