What is the probability of getting an even number
when you roll a die once?.
What is the probability of getting an even number
when you roll a die once?.
3 out of 6 , 3/6 or 50%
If you are looking at a pile of jelly beans and you
choose one, are you are choosing at random?
If you are looking at a pile of jelly beans and you
choose one, are you are choosing at random?
False
When you toss a coin two times, the sample space
contains six possible outcomes.
When you toss a coin two times, the sample space
contains six possible outcomes.
False (2 x 2 = 4 possible outcomes)
The probability that an event happens is 4/12. What is
the probability that the event will not happen?
The probability that an event happens is 4/12. What is
the probability that the event will not happen?
8/12 = 2/3
What is the probability of drawing a red face card (i.e.,
king, queen, or jack) from a full deck of playing cards?
What is the probability of drawing a red face card (i.e.,
king, queen, or jack) from a full deck of playing cards?
6/52 = 3/26
If you spin this spinner 30 times, how many times
might you expect it to land on red?
If you spin this spinner 30 times, how many times
might you expect it to land on red?
30 x 1/3 = 30/3 = 10 times
There are 14 marbles in a bag: 4 red, 4 orange, 5 green,
and 1 blue. You take one marble out of the bag. What is
the probability of getting a red or a blue marble?
There are 14 marbles in a bag: 4 red, 4 orange, 5 green,
and 1 blue. You take one marble out of the bag. What is
the probability of getting a red or a blue marble?
5/14
A spinner is divided into 6 equal parts: 3 green, 2 blue,
and 1 red. What is the probability of spinning green?
A spinner is divided into 6 equal parts: 3 green, 2 blue,
and 1 red. What is the probability of spinning green?
3/6 = ½
Each letter of the word PROBABILITY is written on a
separate card and placed in a bag. Fareshta draws one
card from the bag. What is the probability of her
drawing a B?
Each letter of the word PROBABILITY is written on a
separate card and placed in a bag. Fareshta draws one
card from the bag. What is the probability of her
drawing a B?
2/11
How many possible outcomes are there when you flip a
coin and roll a six-sided die at the same time?
How many possible outcomes are there when you flip a
coin and roll a six-sided die at the same time?
(2 x 6) = 12
If you hit the ball 25% of the time you get to bat, how
many hits would you expect to get in 40 at-bats?
If you hit the ball 25% of the time you get to bat, how
many hits would you expect to get in 40 at-bats?
¼ of 40 = 10
25% of 40 = 10
.25 x 40 = 10
Grant successfully makes one half-court shot out of
three. What is the probability that he scores two halfcourt shots in a row?
Grant successfully makes one half-court shot out of
three. What is the probability that he scores two halfcourt shots in a row?
1/9 (independent events)
An ice-cream store sells 5 different flavours of ice
cream that can be topped with 5 different toppings.
How many flavour and topping combinations are
there?
An ice-cream store sells 5 different flavours of ice
cream that can be topped with 5 different toppings.
How many flavour and topping combinations are
there?
25 (5 x 5 = 25)
Scott’s sock drawer has 6 green socks, 8 white socks,
and 4 black socks. What is the probability that he will
pull out a white sock?
Scott’s sock drawer has 6 green socks, 8 white socks,
and 4 black socks. What is the probability that he will
pull out a white sock?
4/9
A grade 7 class has 18 boys and 14 girls. If a student is
picked at random, what is the probability of picking a
boy?
A grade 7 class has 18 boys and 14 girls. If a student is
picked at random, what is the probability of picking a
boy?
9/16
What is the probability of picking a sour-apple candy
from a jar of candies that has 17 sour apples, 9 sweet
berries, and 4 wacky watermelons?
What is the probability of picking a sour-apple candy
from a jar of candies that has 17 sour apples, 9 sweet
berries, and 4 wacky watermelons?
17/30
In a board game, you can move any number of spaces
up to and including the value you spin. The spinner is
divided into 4 equal sections, numbered 1 to 4. What is
the probability that you win on your next roll, if you
are 3 spaces short of the finish line?
In a board game, you can move any number of spaces
up to and including the value you spin. The spinner is
divided into 4 equal sections, numbered 1 to 4. What is
the probability that you win on your next roll, if you
are 3 spaces short of the finish line?
You need #3 or #4 therefore 2/4 or 1/2
To simulate the gender of an unborn baby, you could
use
To simulate the gender of an unborn baby, you could
use
a coin (2 outcomes)
Four students are running for student council
president. Of 30 students polled, 15 choose Mike, 4
choose Jean, 5 choose Winston, and 6 choose
Francesca. What is the probability of Jean or Francesca
winning the election?
Four students are running for student council
president. Of 30 students polled, 15 choose Mike, 4
choose Jean, 5 choose Winston, and 6 choose
Francesca. What is the probability of Jean or Francesca
winning the election?
10 out of 30 = 10/30 = 1/3 = 33%
Jeff saves 75% of the shots on goal. If Jeff faces 20 shots
in his next game, how many goals can he expect to let
in?
Jeff saves 75% of the shots on goal. If Jeff faces 20 shots
in his next game, how many goals can he expect to let
in?
75% of 20 =5
0.75 of 20 = 5
¾ of 20 = 5