Simple Probability
What is probability?
The likelihood of an event occurring.
1/2
50%
1/4 + 2/4
3/4
The probability of all possible events adds up to what?
100% or 1
A bag has 3 yellow blocks, 2 green blocks, and 5 red blocks. What is the probability of drawing a green block as a fraction and percent?
2/10 or 1/5
20%
2/5
40%
3/10 + 1/5
5/10 or 1/2
You roll a six-sided die. What is the probability of rolling a 3 OR 4?
1/6 + 1/6 = 2/6 or 1/3
What is the difference between experimental and theoretical probability?
Experimental = how frequently an event actually occurred when completing an experiment or what DID happen
Theoretical = how likely an event is to occur mathematically or what SHOULD happen
12/25
48%
5/8 + 4/5
57/40 or 1 17/40
A bag contains three Colts buttons 6 Purdue buttons and 1 IU button. What is the probability that the one you draw is NOT an IU button?
9/10 or 90%
What is the probability of rolling an even number on a die.
3/6 or 1/2
6/15
40%
1/3 + 2/4 + 1/6
12/12 or 1
A chore spinner is laid out as follows:
1/5 do dishes
1/3 clean toilet
2/15 laundry
What is the probability you spin "laundry" or "clean toilet"?
7/15
What is the probability of drawing a heart out of a deck of cards?
13/52 or 1/4
22/40
55%
5/9 + 1/12 + 2/3
47/36 or 1 11/36
A chore spinner is laid out as follows:
1/5 do dishes
1/3 clean toilet
2/15 laundry
Is there another section of this spinner? If so, what is the probability that you land on it?
5/15 or 1/3