Page 427 - Math Smart - 7

. X P, r . numberof favourable outcomes
b) Probability of rolling an even number = r 2 1
^ tota number of possib e outcomes
3 There are 3 even numbers: 2, 4 and 6.
= 6
1 Express as a fraction in its simplest form.
= 2
0 Probability of rolling a number less than 6 = /mmber of favourable outcomes
' ^ total number of possible outcomes

5 There are 5 numbers less than 6:1, 2, 3, 4 and 5.
- 6
r ... , . .. .. number of favourable outcomes
d) Probability of rolling a number greater than 6 = -r~r-, r t rrn r
j
tota number of possib e outcomes
3
»
0 There are no numbers greater than 6 on this die.
= 6
It Is not possible to roll a number greater than 6.
= 0
.
,
_
numberof favourable outcomes
e) Probability of rolling a number less than 10 = ^tal number of possible outcomes
There are 6 numbers on a die that are
less than 10: 1, 2, 3, 4, 5 and 6.
1
=
It is certain that every roll of the dice
will be a number less than 10.

Check My
I
Under

Look at the spinner.
a) Calculate the probability of the following outcomes,
i) Landing on yellow
li) Landing on a colour
ill) Landing on green
iv) Landing on pink

b) Show the probabilities on a probability scale.
0% 50% 100%
I I ^ I ^ 1 1 ^ ^ \ 1

A spinner is numbered as shown.
What is the probability of getting:
a) a 1?
b) a 2?

c) an odd number?
Write each answer as a decimal.

423