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Principles of Probability: Worksheet on Finding the Probability II Demystifying Scientific Data: RET 2006, Rev 2 79 Name ______________________ Period _____ Date_________________ *Worksheet – Finding the Probability of an Event II Find the probability for the following events. 1. A bag contains 4 red marbles, 16 yellow marbles, 5 purple marbles, 16 blue marbles, and 10 green marbles. What is the probability of pulling out a red or a green marble? 2. If one letter is chosen at random from the word combed, what is the probability that the letter chosen will be a "d"? 3. A dice cube has 6 sides that are numbered 1 to 6. If the cube is thrown once, what is the probability of rolling an odd number? 4. If one letter is chosen at random from the word refuse, what is the probability that the letter chosen will be an "e"? 5. The sides of number cube have the numbers 2, 4, 8, 9, 4, and 7. If the cube is thrown once, what is the probability of rolling a 7?Principles of Probability: Worksheet on Finding the Probability II Demystifying Scientific Data: RET 2006, Rev 2 80 6. If one letter is chosen at random from the word substitute, what is the probability that the letter chosen will be a "t"? 7. A die has sides are numbered 1 to 6. If the cube is thrown once, what is the probability of rolling a 6? 8. A bag contains 12 red marbles, 10 green marbles, 2 yellow marbles, 19 blue marbles, and 9 purple marbles. What is the probability of pulling out a green marble? 9. If one letter is chosen at random from the word assists, what is the probability that the letter chosen will be an "s"? 10. The sides of a number cube have the numbers 9, 3, 5, 3, 7, and 9. If the cube is thrown once, what is the probability of rolling a 9? * This worksheet was modified from

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