QUIZ
Directions: Find the probabilities. Show your work.
1. Roll a die. What is the probability of getting a 4?
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2. Roll 3 dice. What is the probability of getting a 3, 4 and 5?
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3. Find the permutation of 3 from 7.
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4. A student has 10 coins in his pocket with 4 quarters and 6 dimes.
a. In how many ways can 3 coins be selected from these 10 coins?
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b. In how many ways can 3 coins be selected that includes exactly one quarter?
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5. Tossing 3 coins, which of the following is a sample space?
a. S={HHH,HHT,HTH,THH,HTT,THT,TTH,TTT}
b. S={one head, two heads, three heads}
c. S={HHH, HHT, HTH, TTT}
6. One draws two cards from a deck of 52 cards without replacement. What is the
probability that the second card is a heart?
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7. A box contains 10 cards labeled from 0 to 9. Once takes three cards such as 123.
How many different numbers can be formed this way?
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8. Suppose 60% of students on a campus are females and 30% of students have dental
insurances. Also, 40% of female students have dental insurance. What is the
probability of randomly selecting a female with dental insurance?
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9. There are 5 candidates running for mayor. What is the probability of one of them
winning?
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10. BONUS: What does probability mean?