Probability
What is the probability a Queen is pulled from a deck of cards (52 cards)?
4/52 ; 1/13
What are the odds in favor of rolling a 3 on a standard die?
1:5
What is a Fair Game?
When the expected value is 0
A soccer player takes eight penalty kicks
in a game. Each attempt results in a goal
or a miss.
2^8 = 256
There are twelve shirts in your closet, four
blue and eight green. You randomly select
one to wear on Monday and then a
different one on Tuesday. You wear blue
shirts both days.
4/12*3/11= 1/11 or 0.091
What is the probability of rolling a 4,5, or 6 on a standard dice?
1/2 ; 50%
What are the odds in favor of rolling a number greater than 3 on a fair die?
3:3 ; 1:1
What is Gamblers Fallacy?
when someone believes an event is less likely to happen in the future due to past results (or vice versa)
A math quiz has four multiple choice
questions. Each question has four options:
A, B, C, and D.
4^4 = 256
A bag contains six red marbles and eight
blue marbles. You randomly pick a
marble and then return it to the bag before
picking another marble. The first marble
is red and the second marble is blue.
6/14 * 8/14 = 12/49 or 0.245
If the probability of winning is 4/5, what is the probability of not winning as a percent?
20%
What are the odds in favor of getting at least one tail after flipping 2 fair coins?
3:1
Is the game fair if the expected value is 2.5?
No, the game is not fair
A spinner has an equal chance of landing
on each of its five numbered regions.
After spinning, it lands in region one or
two.
1/5 + 1/5 = 2/5 or 0.4
A cooler contains twelve bottles of sports
drink: five lemon-lime flavored and seven
orange flavored. You randomly grab a
bottle and give it to your friend. Then,
you randomly grab a bottle for yourself.
You and your friend both get lemon-lime.
5/12 * 4/11 = 5/33 or 0.152
What is the probability of throwing a 3 or a 4 on a regular 6 sided dice?
1/3
What are the odds in favor of rolling a prime number on a standard six-sided die as a percent?
1:1
What is the 3rd planet from the sun?
A litter of kittens consists of two gray
kittens, two black kittens, and two
mixed-color kittens. You randomly pick
one kitten. The kitten is gray or
mixed-color.
2/6 + 2/6 = 2/3 or 0.667
A spinner has an equal chance of landing
on each of its five numbered regions.
After spinning, it lands in region one and
two.
1/5 * 1/5 = 1/25 or 0.04
The odds against winning are 3:1. What is the probability of NOT winning as a percent?
75%
What are the odds against flipping heads with a fair coin?
1:1
What is Pennsylvania's state capital?
Harrisburg
A bag contains five yellow tickets
numbered one to five. The bag also
contains four green tickets numbered one
to four. You randomly pick a ticket. It is
green or has an odd number.
4/9 + 3/9 = 7/9 or 0.778
A box of chocolates contains four milk
chocolates and seven dark chocolates.
Two of the milk chocolates and five of the
dark chocolates have peanuts inside. You
randomly select and eat a chocolate. It is
a milk chocolate and has peanuts inside.
4/11 * 7/11= 23/100 or .23