Simple Probability
Compound Probability
Sample Space
Predictions
Likelihood
100
What's the probability you land on an even number when rolling a fair number cube (dice)? (1, 2, 3, 4, 5, 6)
1/2 = 0.5 = 50%
100
You roll a fair number cube and flip a coin.
What's the probability you get a 5 and heads?
1/12
100
If you roll a die and flip a coin, how many combinations can you get?
Hint: (1,heads) (2,heads) (3,heads)...
12
100
What is the probability Keiko wins?
12/40 = 0.3 = 30%
100
What's the likelihood you'll flip a coin and get heads?
equally likely
200
A school sells 500 raffle tickets. You buy one. What's the probability you'll win?
Hint: make a fraction, decimal, percent
1/500 = 0.002 = 0.2%
200
A jar contains 3 red, 6 yellow, 11 blue, and 15 black marbles.
What's the probability of selecting a black marble, not returning it, and then selecting a red marble?
Hint: make two fractions, one for black, and one for red.
Hint: you lose a marble on your second pick....
45/1,190 = 0.0378... = 3.78%
15/35 times 3/34
200
A person has 52 cards and a spinner with 4 sections. How many combinations are there for picking a card and flipping the coin?
208
200
A number cube with six sides (1, 2, 3, 4, 5, 6) is rolled 180 times.
How many times would you expect it to land on a number greater than 4?
Hint: cross multiply / butterfly method
60 becuase
2/6 = x/180
200
A probability close to 1 is known as __________. A probability of 1 is known as ___________.
Hint: 1 = 100%
likely / certain
300
The school sold 400 raffle tickets. Mark bought 8. What is the probability he wins the raffle?
Hint: make a fraction, decimal, percent
8/400 = 0.02 = 2%
300
You roll a number cube (1, 2, 3, 4, 5, 6) AND spin a spinner divided into four equal sections (red, blue, yellow, green)
What's the probability you roll a 5 and land on green?
Hint: Fraction, Decimal, and Percent
1/24 = 0.04166666 = 41.66666%
300
You flip a coin then pick a letter (A, B, C, D).
What would the denominator of a fraction for this probability problem be?
Hint: How many different combinations of COIN/LETTER are there?
8
300
You roll a number cube 360 times. How many times would you expect it to be an ODD number?
180
3/6 = x/360
300
What's the likelihood you would land on dots OR stripes.
Hint: Make a fraction and turn it into a decimal
unlikely = 6/16 = 0.375 = 37.5%
400
Jamie has 24 oranges, 16 peaches, 14 pears and 18 strawberries.
What is the probability of her choosing a pear or strawberry?
Hint: combine pear and strawberries and make a fraction
32/72 = 0.44444 = 44%
400
You have 5 cards: one red, one green, one yellow, one blue, one pink.
What's the probability you pull a pink on your first try, replace it, and then pull a blue?
Hint: make a fraction for pink, and another fraction for blue?
1/25 = 0.04 = 4%
1/5 * 1/5
400
An ice cream parlor has 3 flavors of ice cream, 2 sauces, and 5 toppings. How many combinations could you make for a sundae?
30
400
What's the probability the next spin will be purple or yellow?
Hint: make a fraction with purple+yellow over total
7/20 = 0.35 = 35%
400
Which event is LESS likely to occur, and what is it's probability?
a. tossing a coin and landing on tails
b. spinning a spinner with five sections labeled 1, 2, 3, 4, 5, and landing on 5
c. picking a red marbles from a bag of 18 marbles: 5 blue, 6 red, 7 green.
B IS LESS LIKELY: 20 PERCENT
a. 1/2 = 0.5 = 50%
b. 1/5 = 0.2 = 20%
c. 6/18 = 0.33333 = 33%
500
A stack of cards are numbered from 1 through 80. If a student selects a card, what is the probability that the student will select a card that has both the same number in the ones place and the tens place?
Hint: 11, 22, 33...
7/80 = 0.0875 = 8.75
500
What's the probability of rolling two dice, and landing on a sum of 5?
Hint: count how many spaces add up to 5
4/36 = 0.1111 = 11%
500
An ice cream parlor has 3 flavors of ice cream: chocolate, vanilla, strawberry), 2 sauces (caramel and fudge), and 5 toppings (sprinkles, whipped cream, m&m's, pecans, gummie bears).
What's the probability you get vanilla, caramel, and gummie bears?
1/30 = 0.03333 = 3.3%
500
A fair number cube, with numbers 1 through 6, was rolled 150 times. The number 5 was rolled 50 times. If the number cube was rolled 600 times, approximately how many times would the number 5 be rolled, based on the experiment?
Hint: cross multiply / butterfly method
200
50/150 = x/600
500
What's the likelihood you'll spin and get a color
certain