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What are the favorable outcomes of spinning an odd number?
(Spinner - page 315)
green 1, purple 1, purple 3, blue 3, orange 3
In how many ways can you spin a number less than 3?
(Spinner - page 315)
5 ways
Describe the likelihood of the event:
The probability of flipping heads on a coin is 0.5.
Equally likely to happen or not happen (50% chance)
Describe the likelihood of the event:
The probability that you are called on to answer a question in class is 1/25.
Unlikely (25% chance)
Find the experimental probability of spinning a 2.
(Bar graph - page 316)
P(2) = 18/100 = 18%
Find the experimental probability of spinning an even number.
(Bar graph - page 316)
P(even) = (18+21)/100 = 39/100 = 39%
Find the experimental probability of not spinning a 5.
(Bar graph - page 316)
P(not 5) = 81/100 = 81%
What is the theoretical probability of spinning an odd number, assuming all sections of the spinner are the same size?
(Bar graph - page 316)
P(odd) = 3/5 = 60/100 = 60%
You have 6 bracelets and 15 necklaces. Find the number of ways you can wear one bracelet and one necklace.
6 x 15 = 90 ways
How many home theater systems can you make from 6 DVD players, 8 TVs, and 3 brands of speakers?
6 x 8 x 3 = 144 home theater systems
The theoretical probability of choosing Event A is 2/7. What is the theoretical probability of not choosing Event A?
P(not A) = 1 - 2/7 = 5/7
Draw a tree diagram to find all of the possible outcomes for the following situation:
You want to buy sunscreen for your Spring Break trip. There are three types of sunscreen (lotion, spray, or gel) that come in four different SPFs (15, 30, 45, or 50).
12 possible outcomes:
L-15, L-30, L-45, L-50, S-15, S-30, S-45, S-50, G-15, G-30, G-45, G-50
The theoretical probability of choosing a red grape from a bag of grapes is 20%. There are 8 red grapes in the bag. How many total grapes are in the bag?
a = p%w
8 = 0.2w
40 grapes = w
A bag contains 50 marbles. You randomly draw a marble from the bag. The theoretical probability of drawing a green marble is 4/10. How many green marbles are in the bag?
a = p%w
a = 0.4 x 50
a = 20 green marbles
You flip a coin and roll a number cube. What is the probability of flipping tails and rolling an even number?
P(T, even) = 1/2 x 3/6 = 3/12 = 1/4 = 25%
You flip two coins and roll a number cube. What is the probability of flipping two heads and rolling a prime number?
P(H, H, prime) = 1/2 x 1/2 x 3/6 = 3/24 = 1/8 = 0.125 = 12.5%