Probability
You roll a fair 6-sided die. What is P(not 5)?
5/6
What is an equivalent fraction to 2/3?
4/6, 8/12, 10/15, 12/18, 20/30, etc.
13/20
65%
Add: 2/6 + 3/6 =
5/6
Jake is going to call one person from his contacts at random. He has 30 total contacts. 16 of those contacts are people he met at school. What is P(call a person from school)?
16/30 = 0.53 = 53.3%
What is an equivalent fraction to 4/5?
8/10, 12/15, 16/20, 20/25
1/2
50%
5/8
If a bag of balloons consists of 47 white balloons, 5 yellow balloons, and 10 black balloons, what is the approximate likelihood that a balloon chosen randomly from the bag will be black?
10/62 = 0.16 = 16%
What is an equivalent fraction to 7/9?
14/18, 21/27, 28/36, 35/45, 70/90
12/25
48%
You randomly draw a marble from a bag of marbles that contains 3 blue marbles, 4 green marbles, and 5 red marbles. What is P(draw a blue marble)?
3/12 = 1/4
What is an equivalent fraction to 24/36?
12/18, 8/12, 6/9, 4/6, 2/3
3/10
30%
Add (and SIMPLIFY!): 3/15 + 2/15 =
1/5 (5/15 can be divided by 3 on the top and bottom)
Leslie is a biologist. She is going to randomly select one animal from her lab to study. There are 5 salamanders, 3 crayfish, and 12 minnows in her lab. What is P(salamander)?
5/20 = 1/4 = 25%
What is an equivalent fraction to 18/24?
9/12, 6/8, 3/4, 36/48
16/40
40%
Add: 5/10 + 5/10 =
1 (10/10 = 1 whole)