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WorksheetsProbability
Total questions: 15
Worksheet time: 38mins
Name
Class
Date
1.
A bag has 3 red marbles, 2 blue and 4 yellow. What is the theoretical probability of pulling a red?
a)
3/10
b)
3/9
c)
1/9
d)
1/3
2.
Three events occur with probabilities P(E1) = 0.35, P(E2) = 0.15, P(E3) = 0.40. If the event B occurs, the probability becomes P(E1|B) = 0.25, P(B) = 0.30. Calculate P(E1 or B).
a)
0.075
b)
0.575
c)
0.021
d)
0.475
3.
A recent study of 200 nurses found that of 125 female nurses, 56 had bachelor's degrees: and of 75 male nurses, 34 had bachelor's degrees. If a nurse is selected at random, find the probability that the nurse is a female or has a bachelor degree.
a)
159/200
b)
125/200
c)
215/200
d)
90/200
4.
A recent study of 200 nurses found that of 125 female nurses, 56 had bachelor's degrees: and of 75 male nurses, 34 had bachelor's degrees. If a nurse is selected at random, find the probability that the nurse selected is a male nurse with a bachelor's degree.
a)
56/200
b)
34/200
c)
75/200
d)
125/200
5.
At a particular school with 200 male students, 58 play football, 40 play basketball, and 8 play both. What is the probability that a randomly selected male student plays neither sport?
a)
49/100
b)
29/100
c)
51/100
d)
9/20
6.
In a statistics class there are 18 juniors and 10 seniors; 6 of the seniors are females, and 12 of the juniors are males. If a student is selected at random, find the probability of selecting a junior or a female.
a)
24/28
b)
12/28
c)
18/28
d)
6/28
7.
The Bargain Auto Mall has these cars in stock. If a car is selected at random, find the probability that it is Foreign and mid-sized.
a)
20/300
b)
135/300
c)
155/300
d)
40/300
8.
The Bargain Auto Mall has these cars in stock. If a car is selected at random, find the probability that it is Domestic or an SUV.
a)
210/300
b)
85/300
c)
295/300
d)
230/300
9.
A farm has 5 brown cows and 10 white cows. A fence is open and two cows escape. What is the probability that it will be a brown cow, then a white cow?
a)
1/9
b)
2/9
c)
5/21
d)
10/21
10.
You roll two die.
What is the probability you will roll a 4, then roll a number less than 3?
a)
1/36
b)
1/18
c)
1/9
d)
1/6
11.
a)
.2855
b)
.6246
c)
.0922
d)
.3230
12.
What is the probability that a student does not play on a sports team?
a)
.5
b)
.45
c)
.55
13.
Mary is a good student. The probability that she studies and passes her test is 3/5. If the probability that she studies is 8/9. What is the probability that she passes given that she studies?
a)
27/40
b)
1.48
c)
.008
d)
.0593
14.
What is the probability of choosing a Honda?
a)
.5970
b)
.5373
c)
.4627
d)
.4030
15.
What is the probability that a student does play a sport given they do not play an instrument?
a)
.2
b)
.2222
c)
.10
d)
.5
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