Probability
What is the probability of flipping heads on a fair coin?
1/2
Find the median of the following data set.
4, 6, 8, 10, 12
8
Solve:
x+7=15
x=8
What information does a two-way table organise?
Sample space for two different categories of data
Which planet is known as the Red Planet?
Mars
A spinner has 8 equal sections. Two sections are blue.
What is the probability of landing on blue? simplify
2/8=1/4
Find the mean of the following scores.
9, 11, 8, 12
show working out
(9+11+8+12)/4 = 10
5a=30
a=6
if 25 students play soccer and 15 students do not, how many students were surveyed?
40 students
In Minecraft, what material do you need to mine diamonds?
an iron pickaxe
A bag contains 5 red marbles, 3 blue marbles and 2 green marbles.
What is the probability of choosing a green marble?
2/10 =1/5
The table below shows students' favourite fruits.
Fruit Frequency
Apple 6
Banana 9
Orange 5
Pear 3
Which fruit is the mode?
3x+4=19
x=5
In a Venn diagram, where do students who belong to both groups go?
in the overlapping section in the middle
How many colours are there in a standard rainbow?
7 (ROY G BIV)
A spinner has 4 equal sections labelled A, B, C and D.
Write the sample space for one spin of the spinner.
{A, B, C, D}
What is the difference between a population and a sample?
What is the inverse operation of multiplication?
Division
A class has 30 students.
18 like pizza.
12 do not like pizza.
What is the probability that a randomly selected student likes pizza?
18/30 = 3/5
Which Disney movie features the song "Let It Go"?
Frozen
A bag contains 6 red marbles and 4 blue marbles.
What is the probability of not choosing a red marble?
P(Not Red)=1−6/10=4/10 =2/5
Write an example of primary data
answers may vary up to teacher discretion
example- collecting results from a class survey
A rectangle has a length of 3x and a width of 2x
if x=4 what is the perimeter?
2x3x4 + 2x2x4
=24 + 16
=40
A two-way table shows:
How many students were surveyed?
50 students
How many hearts does an octopus have?
3