WorksheetsProbability Test Review MCQ
Total questions: 10
Worksheet time: 5mins
Students at University X must be in one of the class ranks—freshman, sophomore, junior, or senior. At University X, 35% of the students are freshmen and 30% are sophomores. If a student is selected at random, the probability that he or she is either a junior or a senior is
30%
35%
65%
70%
Cannot be determined from the information given.
In a particular game, a fair die is tossed. If the number of spots showing is either four or five, you win $1. If the number of spots showing is six, you win $4. And if the number of spots showing is one, two, or three, you win nothing. You are going to play the game twice. The probability that you win $4 both times is
1/6
1/3
1/36
1/4
1/12
In a particular game, a fair die is tossed. If the number of spots showing is either four or five, you win $1. If the number of spots showing is six, you win $4. And if the number of spots showing is one, two, or three, you win nothing. You are going to play the game twice. The probability that you win money at least once in the two games is
0.75
0.25
0.5
0.1
0.125
An event A will occur with probability 0.5. An event B will occur with probability 0.6. The probability that both A and B will occur is 0.1. The conditional probability of A given B is
0.5
0.3
0.2
1/6
Cannot be determined from the information given.
If you buy one ticket in the Math-o-licious Lottery, then the probability that you will win a prize is 0.11. If you buy one ticket each month for five months, what is the probability that you will win at least one prize?
0.55
0.5
0.44
0.45
0.56
Suppose that A and B are two independent events with P(A) = .2 and P(B) = .4. is
0.08
0.12
0.52
0.60
0.80
A die is loaded so that the number 6 comes up three times as often as any other number. What, then, is the probability of rolling a 6?
0.125
0.250
0.375
0.500
None of these
A psychologist studied the number of puzzles subjects were able to solve in a five-minute period while listening to soothing music. Let X be the number of puzzles completed successfully by a subject. X had the following distribution:
What is the probability that a randomly chosen subject completes at least 3 puzzles in the five-minute period while listening to soothing music?
0.3
0.4
0.6
0.9
The answer cannot be computed from the information given.
A psychologist studied the number of puzzles subjects were able to solve in a five-minute period while listening to soothing music. Let X be the number of puzzles completed successfully by a subject. X had the following distribution:
P(X < 3) is
0.3
0.4
0.6
0.9
The answer cannot be computed from the information given.
A psychologist studied the number of puzzles subjects were able to solve in a five-minute period while listening to soothing music. Let X be the number of puzzles completed successfully by a subject. X had the following distribution:
The mean μ of X is
2.0
2.3
2.5
3.0
The answer cannot be computed from the information given.
