15 Relative Frequency And Probability Examples And Worksheets - Maths Quest General Maths Preliminary Course Page 29
ADVERTISEMENT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
3012
14
When 400 cars are checked for a defect, it is found
A barrel contains 20 marbles of which 6 are
that 350 have the defect. If one is chosen at random
black. One marble is selected at random. Find the
from the batch, find the probability that it has the
probability that the marble selected is:
a
b
black
not black.
defect and hence describe the chance of the car
having the defect.
15
The probability that a person must stop at a set of
7
traffic lights is
. What is the probability of not
13
State the event that is complementary to each of the
12
following.
needing to stop at the lights?
a
Tossing a coin that lands Tails
16
On a bookshelf there are 25 books. Of these, seven
b
Rolling a die and getting a number less than 5
are fiction. If one book is chosen at random, what is
c
Choosing a blue ball from a bag containing 4
the probability that the book chosen is non-fiction?
blue balls, 5 red balls and 7 yellow balls
Extended response
1
Theo, Marcus, Olivia, Ben and Kelly are the finalists in a contest run by a music store. Two names will be
drawn. The first name will win two tickets to a ‘Silverchair’ concert.
a
What is the probability that Marcus wins the Silverchair tickets?
b
Ben and Kelly agree that if either win a prize, they will take the other to the concert. What is the
probability that Ben and Kelly will attend the concert?
c
What is the probability that neither Ben nor Kelly win the tickets?
2
A navy ship fires 60 missiles at a target and hits the target 42 times.
a
Find the relative frequency of a missile hitting its target.
b
What is the relative frequency of a missile missing its target?
c
Describe in words the chance of a missile hitting its target.
eBook
plus
eBook plus
Digital doc
Test Yourself
doc-1664
Chapter 15
507
Chapter 15
Relative frequency and probability
ADVERTISEMENT
0 votes
Related Articles
Related forms
Related Categories
Parent category: Education