Independent & Dependent
If the Atlanta Hawks free throw percentage is 82%, find the probability that a player for the Hawks will make 2 free shots in a row.
What is .67 or 67%
Fresman - 2, Sophomores - 3, Juniors - 5 &Seniors - 4
What is the P(senior)?
What is 2/7?
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?
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% ?
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% ?
Two cards are drawn without replacement. What is the probability that both are hearts?
What is 1/17 ?
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 ?
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 ?
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% ?
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% ?
Two events are this if they can not occur at the same time.
What is mutually exclusive
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 ?
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 % ?
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% ?
Susan took two tests. The probability of her passing both tests is 0.6. The probability of her passing the first test is 0.8. What is the probability of her passing the second test given that she has passed the first test?
.75 or 75%
James has 3 dimes, 4 pennies, and 2 quarters in his pocket. If each coin is equally likely to be pulled out of his pocket in order without replacement, what is the probability that he will pull out the 2 quarters in a row first?
What is 1/36 ?
One possible result of a situation or experiment
is a(n)......
What is outcome?
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% ?
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% ?
A bag contains red and blue marbles. Two marbles are drawn without replacement. The probability of selecting a red marble and then a blue marble is 0.28. The probability of selecting a red marble on the first draw is 0.5. What is the probability of selecting a blue marble on the second draw, given that the first marble drawn was red?
.56 or 56%
The chance of rain on a random day in May in Gwinnett is about 30%. Using this empirical probability, what would you estimate the probability of having NO rain for an entire week (7 days)?
.0823 or 8.2%
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 ?
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% ?
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% ?
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% ?