WGU C955 - Module 7 Probability.docx

What is the probability of someone having a birthday in March or December? a 1/6 b 1/4 c 1/3 d 1/2 - correct answer 1/6 The table below shows the breakdown of workers at a business. What is the probability of selecting a worker who is over 45 years of age to the nearest hundredth? Age 18−25 26−44 45+ Total Male Female Total a 0.16 b 0.29 c 0.42 d 0.55 - correct answer 0.29 The table below shows the breakdown of workers at a business. What is the probability that a randomly selected 18−25 year old is male (to the nearest hundredth)? Age 18−25 26−44 45+ Total Male Female Total a 0.48 b 0.52 c 0.56 d 0.60 - correct answer 0.60 The probability that Jimmy attends school on any given day is 0.98 . The probability Jimmy misses a day of school, given that he missed the day before, is 0.5 . What is the probability that Jimmy misses school on BOTH Tuesday and Wednesday? a 0.0004 b 0.01 c 0.02 d 0.04 - correct answer 0.01 The following table shows the percentage of events at an arena. Basketball 26% Hockey 19% Concert 18% Table Tennis 9% Other 28% What is the disjoint probability of having a basketball or hockey game at the arena? a 27% b 37% c 45% d 55 - correct answer 45% A game has a 10 -sided fair die. What is the probability of rolling an even number or a number less than 5 ? a 1/10 b 3/10 c 7/10 d 9/10 - correct answer 7/10 A survey on favorite pizza topping was given: 33% said cheese was their favorite topping, 25% said pepperoni, 15% said sausage, and 27% said other. If two people are picked at random and replaced, what is the probability of picking two people that like cheese? Round your answer to a whole number. a 0% b 11% c 33% d 66% - correct answer 11% There was a marble drawn from a bag in an experiment and placed back in the bag repeatedly. A red marble appeared 45 times, a blue marble 70 times, a green marble 63 times, and a black marble 22 times. What is the empirical probability of the blue marble? a 0.11 b 0.225 c 0.315 d 0.35 - correct answer 0.35 In a bag, there are 8 red marbles, 10 blue marbles, 9 green marbles, and 5 black marbles. Find the theoretical probability of drawing a red marble out of the bag. a 5/32 b 1/4 c 9/32 d 5/16 - correct answer 1/4 What is the sample size for choosing an odd number between 1 and 75 , including the numbers 1 and 75 ? a 37 b 38 c 39 d 40 - correct answer 38 There are black, blue, and white marbles in a bag. The probability of choosing a black marble is 0.36 . The probability of choosing a black and then a white marble is 0.27 . To the nearest hundredth, what is the probability of the second marble being white if the first marble chosen is black? a 0.27 b 0.39 c 0.75 d 0.86 - correct answer 0.75 There are 10 blue, 10 red, and 10 green labels in a bag. The labels are drawn from the bag and not replaced. What is the probability of drawing a blue first, and not blue second to the nearest percent? a 22% b 23% c 32% d 33% - correct answer 23% The numbers 1−10 are in a bag and two are drawn without replacement. What is the probability of drawing an even number first, and a 1 second? a 1/2 b 1/9 c 1/18 d 1/20 - correct answer 1/18 Question 14 The table below shows the breakdown of workers at a business. What is the probability of selecting a male worker to the nearest hundredth? Age 18−25 26−44 45+ Total Male Female Total a 0.46 b 0.48 c 0.52 d 0.54 - correct answer 0.52