CHAPTER 9 / SPECIAL MATH PROBLEMS 355
- The probability of an impossible event is __.
- The probability of an event that is certain is __.
- If a jar contains 3 red marbles, 4 white marbles, and 5 blue marbles, then what is the probability of ran-
domly choosing
a red marble? __
a white marble? __
a blue marble? __ - A jar contains 5 red marbles and 10 white marbles.
What is the probability of drawing a red marble? __________
If 3 more red marbles are added, then what is the probability of drawing a red marble? __________- A jar contains 24 red and blue marbles. If the probability of selecting a red marble at random is^3 ⁄ 8 , then how
many red marbles must be added so that the probability of randomly selecting a red marble becomes^1 ⁄ 2? - A jar contains only black, white, and red marbles. The probability of choosing a white marble is^2 ⁄ 3. If there
are 4 times as many red marbles as black marbles, what is the least possible number of marbles in the jar?
Concept Review 6: Probability Problems