EXERCISES OF PROBABILITYOnline version CHOOSE THE CORRECT ANSWER by Milagros Fernandez Jimenez 1 If a single 6-sided die is rolled, what is the probability of rolling a number that is not 8? a 5/6 b 1 c None of the above 2 Which of the following are mutually exclusive events when a day of the week is chosen at random? a Choosing a Monday or choosing a Wednesday b Choosing a weekday or choosing a weekend day c All of them d Choosing a Saturday or choosing a Sunday 3 A single letter is chosen at random from the word TEACHER. All of the following are mutually exclusive events except: a Choosing a T or choosing a consonant b Choosing a T or choosing a vowel c None of the above d Choosing an E or choosing a C 4 The probability of a New York teenager owning a skateboard is 0.37, of owning a bicycle is 0.81, and of owning both is 0.36. If a New York teenager is chosen at random, what is the probability that he/she owns a skateboard or a bicycle? a 1.18 b 0.7 c 0.82 d None of the above 5 A single 6-sided die is rolled. What is the probability of getting a number greater than 3 or an even number? a 1 b 2/3 c 5/6 d None of the above 6 Four cards are chosen from a standard deck of 52 playing cards with replacement. What is the probability of getting 4 hearts? a 13/52 b 1/16 c 1/256 d None of the above 7 Two cards are chosen at random from a deck of 52 cards without replacement. What is the probability of getting two kings? a 4/663 b 1/221 c 1/69 d None of the above 8 Spin a spinner numbered 1 to 7, and toss a coin. What is the probability of getting an odd number on the spinner and a tail on the coin? a 3/14 b 5/14 c 2/7 d None of the above 9 A school survey found that 7 out of 30 students walk to school. If four students are selected at random without replacement, what is the probability that all four walk to school? a 1/783 b 343/93960 c 7/6750 d None of the above 10 At a middle school, 18% of all students play football and basketball, and 32% of all students play football. What is the probability that a student who plays football also plays basketball? a 56% b 178% c 50% d None of the above 11 In a shipment of 100 televisions, 6 are defective. If a person buys two televisions, what is the probability that both are defective? a 3/100 b 9/2500 c 1/330 d None of the above
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