Theoretical & Experimental Probability
Frequency Tables
Compound Probability
Probability Models
Conditional Probability
100
The theoretical probability of rolling an odd number on a standard number cube.
What is 1/2 ?
100
Fresman - 2, Sophomores - 3, Juniors - 5 &Seniors - 4
What is the P(senior)?
What is 2/7?
100
You eat a piece of fruit from a basket of apples, bananas, pears and melons. Later your brother eats a piece of fruit from the basket. Do these represent independent or dependent events?
What is dependent events?
100
What is the probability that a randomly chosen patient caught a cold and did not exercise?
Caught a cold | Did not catch | Totals | |
Exercised | 8 | 30 | 38 |
Did not exercise | 10 | 2 | 12 |
Totals | 18 | 32 | 50 |
What is 1/5 or 0.2 or 20% ?
100
What is P(4-wheel drive | pickup truck)?
2-Wheel Drive | 4-wheel drive | Totals | |
Pick up Trucks | 0.15 | 0.33 | 0.48 |
SUVs | 0.28 | 0.24 | 0.52 |
Totals | 0.43 | 0.57 | 1 |
What is 0.6875 or 68.75% ?
200
The probability of tossing at least 1 tail if you toss three coins at once?
What is 7/8 ?
200
Find the relative frequency that a student was not involved in a water sport.
Activity | Number of People |
Waterskiing | 12 |
Hiking | 18 |
Canoeing | 13 |
What is 18/43 ?
200
What is P(A and B) if A and B are independent events, P(A)=0.24 and P(B)=0.15?
What is 0.036 ?
200
What is the probability that a randomly chosen patient exercised and did not catch a cold?
Caught a cold | Did not catch | Totals | |
Exercised | 8 | 30 | 38 |
Did not exercise | 10 | 2 | 12 |
Totals | 18 | 32 | 50 |
What is 3/5 or 0.6 or 60% ?
200
In a survey of computer owners, 80% use an anti-virus program, 25% use an anti-spyware program, and 15% use both. What is P(anti-virus|anti-spyware)?
What is 3/5 or 60% ?
300
A bag has 42 red marbles, 15 blue marbles, 3 orange, and 8 green marbles. If a marble is chose at random, what is the probability that the marble is not orange?
What is 65/68 ?
300
Favorite Fruit
Fruit Number of repsonses
apple 12
pear 25
banana 11
What is the relative frequency of choosing a pear?
What is 25/48 ?
300
At a grocery store, there is a 62% chance that a customer will pay with a credit card and a 25% chance that a customer will pay with cash. What is the probability that a randomly selected customer will pay with a credit card or cash?
What is 87 % ?
300
What is P(did not exercise | did not catch a cold)?
Caught a cold | Did not catch | Totals | |
Exercised | 8 | 30 | 38 |
Did not exercise | 10 | 2 | 12 |
Totals | 18 | 32 | 50 |
What is 1/16 or 0.0625 or 6.25% ?
300
Half of the class took Form A of a test and half of the class took Form B. Of the students who took Form B, 39% passed. What is the conditional probability that a randomly chosen student took Form B and passed?
What is 0.195 or 19.5% ?
400
A spinner has 4 equal sections. After 12 spins, the spinner landed on section A 4 times, section B 5 times, section C 2 times, and section D 1 time.
What is the experimental probability of the spinner stopping on section A?
What is 1/3 ?
400
One possible result of a situation or experiment
is a(n)......
What is outcome?
400
Angelo chooses a number from 1 to 10. What is the probability that he chooses an odd number or a multiple of 5?
What is 3/5 or 0.6 or 60% ?
400
What is P(has red berries | has lobed leaves)?
Lobed | Non-lobed | Totals | |
Red Berries | 12 | 48 | 60 |
No Red Berries | 40 | 0 | 40 |
Totals | 52 | 48 | 100 |
What is 3/13 or 0.231 or 23.1% ?
400
The diagram shows the percentages of plants that received sunlight and whether or not they grew. What is the probability that the plant grew?
WS 13.6 form G - # 6
What is 0.3775 or 37.75% ?
500
If the probability of an event occurring is 1/4 , what is the probability of its complement?
What is 3/4 ?
500
The relative frequencies of two of three possible outcomes are 1/2 and 1/3. What is the relative frequency of the third outcome?
What is 1/6 ?
500
A spinner has 8 equal sections numbered 1 to 8. What is the probability of the spinner stopping on a number that is a multiple of 3 or is greater than 5?
What is 1/2 or 0.5 or 50% ?
500
What is P(has lobed leaves | has red berries)?
Lobed | Non-lobed | Totals | |
Red Berries | 12 | 48 | 60 |
No Red Berries | 40 | 0 | 40 |
Totals | 52 | 48 | 100 |
What is 1/5 or 0.2 or 20% ?
500
In the senior class, 24% of the students play softball, 32% play hockey and 14% play both. What is the probability that a hockey player also plays softball?
What is 0.4375 or 43.75% ?