Probability
What is the probability of rolling a 3 using a six-sided die?
1/6 or 17/100 or 17%
What is an equivalent fraction of 2/3?
6/9, 4/6, 10/ 15
5 3/4 or 5 2/8
5 3/4 is greater
Alice walks 3/4 miles a day for 8 days. How many miles does Alice walk altogether?
24/4 = 6 miles
What does probability mean?
Probability is the ratio of the times an event is likely to occur divided by the total possible events.
times an event is likely to occur/ total possible events
number of ways it can happen/ total number of outcomes
Is 4/6 equivalent to 8/12?
yes
4/14 or 12/5
4/14 is greater
A rectangular piece of paper measures 6 inches by 7/8 inches. What is the area of the piece of paper?
5 1/4
Alex flips a coin. What is the probability of getting heads?
1/2
yes
3 2/3 or 3 2/6
Write an expression for this word problem:
Noah buys 0.68 pounds of yellow candy, 0.2 pounds of green candy, and 0.34 pounds of red candy. Each pound of candy costs $1.50. How much money does Noah spend?
(0.68+0.2+0.34) X 1.5
If you go to school Monday through Friday and you know the cafeteria is going to serve pizza two days that week, what is the probability that pizza will be served on any given day?
It would be 2/5, because there are two desired outcomes (pizza!) and five possible outcomes (days of the school week).
What's an equivalent fraction to 16/ 20?
4/5
11/3 or 7/2
11/3 is greater
Travis keeps track of how many steps he takes each day.
• He walks 11 ,234 steps on Monday and 7 ,586 steps on Tuesday.
• On Wednesday, Mr. Davis walks 1 ,620 more steps than on Monday.
• On Thursday, he walks 430 fewer steps than on Tuesday.
How many total steps does Mr. Davis walk? Show your equations.
11,234 + 1,620 = 12,854
7,586 − 430 = 7,156
11,234 + 7,586 + 12,854 + 7,156 = 38,830
Travis walks 38,830 total steps.
What is relative frequency?
times it happened/ times it was tried
Are 4/6, 2/3 and 8/12 equivalent?
yes
2 2/4 or 2 6/10
2 6/10
Rex runs 5 3/10 miles each day. How many miles does Rex runs in 2 weeks?
74 2/10
74 1/5