Masc161



Exercise1) which of the following is an experiment?a) Tossing a coinb) Rolling a single diec) Choosing a marble from a jard) All of the above2) What is the probability of choosing a vowel from alphabet?a) 21/26b) 5/26c) 1/21d) None of the above3) A number between 1 and 11 chosen at random, what is the probability of choosing an odd number? a) 1/11b) 5/11c) 6/11d) None of the above4) A glass jar contains 5red, 3blue and 2 green jelly beans. If a jelly bean is chosen at random from the jar. Then which of the following is an impossible event?a) Choosing a red jelly beanb) Choosing a blue jelly bean c) Choosing a yellow jelly beand) None of the above5) A spinner has 7 equal sectors numbered I to 7 ,if you spin the spinner, then which of the following is certain event ?a) Landing on a number less than 7b) Landing on a number less than 8c) Landing on a number greater than 1d) None of the above 6) If a number is chosen at random from the following list 2,3,30,5,7,11,13,17,20,24, then what is the probability that it is prime?a) 1/10b) 7/10 c) 5/10d ) 9/107) The sample space of choosing an odd number between 1 and 11 at random is………………….a) {1, 3, 5, 7, 9, 11}b) {1, 3, 5, 9, 10, 11}c) {1, 3, 5, 6, 9, 10}d) None of the above8) Choose one letter at random from the word mission, and then the sample space is ……………a) { m ,I ,s ,s ,I ,o ,n}b) { m ,I ,s, o ,n}c) { m ,I ,o ,s ,s }d) None of the above9) The sample space of choosing 1 letter at random from 5 vowels is ………………,a) { a ,e ,I ,o, u}b) { v ,o ,w ,e, l}c) {1, 2 ,3 ,4 ,5}d) None of the above 10 )If S = {1, 2,3 ,5 ,6 ,8,10,11,12 ,13} ,A={2 , 3 ,5} ,and B={2,3 ,11 ,13 },then i) A ∩ B =………….. II) A ∪ B =……………………….III) (A ∩ B) ' =……………………….IV) A'=…………………….11) A student is chosen at random from a class of 16 girls and 14 boys. The probability that the student chosen is not a girl is ……….a) 8/15b) 7/15c) 1d) None of the above 12) A number is chosen at random from the following list 2 ,3, 5 ,7 ,11 , 13, 17 ,19 ,the probability that it is not prime …………..a) 1b) 1/8 c) 0d) None of the above 13) All of the following are mutually exclusive events when a single 6 – sided die is rolled except ……….a) Getting a number less than 4 or getting a number greater than 4b) Getting a 2 or getting an odd number c) Getting a 2 or getting an even number d) None of the above 14) A day of the week is chosen at random. The probability of choosing a Monday or Tuesday ……a) 1/7b) 2/14c) 2/7d) 3/715) A number between 1 and 10 is chosen at random .The probability of getting a 5 or an even number ……………………………….a) 3/5b) 1/2c) 1/5d) 5/14 16) Spin a spinner numbered 1 to 7, and toss a coin .The probability of getting an odd number on the spinner and a tail on the coin ……..a) 3/14b) 2/7 c) 5/14d) None of the above17) A jar contains 6 red balls, 3 green balls, 5 white balls, and 7 yellow balls. Two balls are chosen from the jar, with replacement.i) The probability that both balls are green a) 6/441b) 2/49c) 1/49d ) 9/442ii) The probability of getting a red and a yellow ball is…………a ) 2/21b) 3/21c) 13/63d) 1/2118) Four cards are chosen from standard deck of 52 playing cards with replacement .the probability of getting 4 hearts is ……….a) 13/52b) 1/16c) 1/25619) Two cards are chosen at random from a deck of 52 cards without replacement. The probability of getting two kings ………….. a) 4/663b) 1/221 c) 1/6920) On a math test, 5 out of 20 students got in A. If three students are chosen at random without replacement .The probability that all three got an A on the test is ……….a)1/114b) 25/1368c) 3/400 21) At a middle school, 18 % of all students play football and basketball, and 32 % of all students play football .the probability that a student who plays football also plays basketballa) 56%b) 178%c) 50%22) A large basketball of fruits contains 3 oranges, 2 apples, and 5 bananas. If a piece of fruit is chosen at random, the probability of getting orange or banana is ……a) 4/5b) 1/2 c) 7/10 23) in a class of 30 students ,there are 17 girls and 13 boys .A total of 5 students made an A grade on their report card , three of which were girls .if a student is a chosen at random . The probability of getting a girl or an A student is ……..a) 19/30b) 11/15c) 17/18024) Which of these numbers cannot be a probability? a) -0.000001b) 0.5c) 20%25) Two coins are tossed. The probability that on head only is ……..a) 1/2b) 1/4c) 3/4 26) Two dice are rolled; the probability that the sum is equal 5 is …….a) 3/9b) 1/9c) 7/36 27) A die is thrown once what’s the probability that the score is a factor of 6a) 1/6b) 1/2c) 2/328) The question do you smoke? Was asked of 100 people.Ruslet are shown in the table yesnototalmale194160female122840total3169100*what is the probability of randomly selected individual being a male who smokes?** What is the probability of randomly selected individual being a male? ................
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