Theoretical Probability
The probability of flipping a coin and getting heads is...
50%
If you flip a coin 10 times and get heads 6 times.....
The experimental probability of getting heads is 6/10 or 60%.
Rolling a 7 on a standard six sided die or flipping a coin and having it land on both heads and tails simultaneously.
Impossible
A box contains 7 white papers, 3 purple papers, and 8 red papers. What is the probability that the paper picked at random is purple?
3/18 divided each by 3 = 1/6
93x76
7,068
The probability of rolling a 6 on a standard six sided die is...
1/6
If you roll a six sided die 20 times and get a 4 five times...
The experimental probability of rolling a 4 is 20%.
Winning the lottery
unlikey
A bag of 3 red marbles, 5 blue marbles, and 2 green marbles. What is the probability of randomly picking a blue marble?
There are 10 total marbles. The probability of picking a blue marble is 1/2 simplified.
49x34
1,666
In a standard deck of 52 cards, the probability of drawing an ace is..
4/52
If you spin a spinner 30 times and it lands on red 12 times...
The experimental probability of the spinner landing on red is 40%.
During rush hour is it likely to go into traffic?
Likely
You roll a standard six sided die. What is the probability of rolling a number greater than 4?
There are two numbers greater than 4 (5 and 6). The probability is 1/3 simplified.
45x76(3+5)
27,360
If a bag contains 5 red marbles and 10 blue marbles, the probability of drawing a red marble is..
5/15
If you survey 50 students and 25 say they prefer pizza...
A student preferring pizza is 50%.
The Sun rising tomorrow.
Certain
A factory produces 1000 light bulbs. 5% are defective. What is the probability of selecting a defective light bulb?
5% of 1000 is 50 defective light bulbs. The probability of selecting a defective light bulb is 1/20 simplified.
89x33(78-56)
64,614
A card is drawn from a standard deck of cards. What is the theoretical probability that the card drawn is an 8?
4/52 divided by 4/4= 1/13
If you bowl 10 games and get over 200 in 2 games...
The probability of bowling over 200 is 20%.
Flipping a coin and getting either heads or tails.
Certain
A box contains 4 red balls and 6 blue balls. You draw a ball, and it is blue. What is the probability that the next ball drawn will also be blue, assuming you don't replace the first ball?
After drawing a blue ball, there are 5 blue balls and 4 red balls left. The probability of drawing another blue ball is 5/9.
756-34(46x33)
-50,856