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Worksheets11-1 and 11-2 Probability Basics
Total questions: 20
Worksheet time: 1hrs 4mins
Name
Class
Date
1.
You flip a nickel three times.
Find the probability that all flips will land on tails.
Find the probability that all flips will land on tails.
a)
1/2
b)
1/4
c)
1/6
d)
1/8
2.
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
3.
A store sells shirts that are either small, medium, or large. The colors are either red, blue, green, or white. What is the probability someone will select a large green shirt?
a)
1/3
b)
1/7
c)
1/9
d)
1/12
4.
You pick a marble from this bag.
What is the probability you will choose either a black or white marble?
What is the probability you will choose either a black or white marble?
a)
3/5
b)
9/100
c)
1/10
d)
2/5
5.
You roll two die.
What is the probability you will roll a 4, then roll a number less than 3?
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
6.
In a drawer, there are 6 white socks, 4 black socks, and 2 brown socks. You pick out a sock, replace it, then pick out a 2nd sock. What is the probability that you will pick a brown, then black sock?
a)
1/11
b)
1/18
c)
1/36
d)
2/33
7.
What is the probability of spinning an even number?
a)
16 2/3%
b)
33 1/3%
c)
50%
d)
75%
8.
A bag contains 5 quarters, 2 dimes, and 4 pennies. What is the probability of picking a quarter?
a)
5/11
b)
5/6
c)
1/3
d)
5
9.
Is the spinner more likely or less likely to land on green than yellow?
a)
more likely
b)
less likely
10.
If you were to roll the die one time what is the probability of it landing on a 2?
a)
2 out of 6
b)
2 out of 2
c)
1 out of 6
d)
1 out of 1
11.
What is the probability of getting an odd number when rolling a single 6 sided die?
a)
1/6
b)
2/6
c)
3/5
d)
3/6
12.
What is the probability of the spinner landing on red?
a)
5/12
b)
1/5
c)
5/5
d)
3/5
13.
What is the probability of spinning the spinner and landing on the 7?
a)
impossible
b)
equally likely
c)
unlikely
d)
very likely
14.
P(not A) =
*Remember to simplify.*
*Remember to simplify.*
a)
6/8
b)
3/4
c)
2/8
d)
1/4
15.
A bag has 3 red marbles, 2 blue 4 green and 1 yellow. What is the theoretical probability of pulling a red?
a)
3/10
b)
3/9
c)
1/9
d)
1/3
16.
What is the probability of rolling a cube and having it land as a six?
a)
1/6
b)
5/6
c)
1/3
d)
1/2
17.
Probability is ...
a)
the chance that some event will occur.
b)
a game that involves coins.
c)
a guarantee.
18.
The probability of it raining today is 30%. What is the probability that it will NOT rain?
a)
30%
b)
70%
c)
100%
d)
0%
19.
What is the probability of selecting an orange candy?
a)
0%
b)
25%
c)
50%
d)
100%
20.
The probability of a video game being defective is 1 out of 20. About how many video games would be defective in a shipment of 490 video games? (Round your answer to the nearest whole number.)
a)
490
b)
25
c)
98
d)
100
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