Probability
What is the probability of flipping heads on a fair coin?
1/2 or 0.5
There are 3 red marbles and 2 blue marbles in a bag. What is the probability of drawing a red marble?
3/5 or 0.6
You roll a 6-sided die. What is the probability of rolling a 4?
1/6
A spinner has 4 equal sections labeled A, B, C, D. What is the probability it lands on C?
1/4 or 0.25
What is the probability of drawing a heart from a standard deck of cards?
13/52 or 1/4
What is the probability of rolling an even number on a 6-sided die?
3/6 or 1/2
You draw 1 card from a deck. What is the probability of drawing a King?
4/52 = 1/13
A jar has 5 green, 4 red, and 1 yellow marble. What is the probability of picking a yellow one?
1/10
You toss two coins. What is the probability both land heads?
1/4
What is the probability of drawing a vowel from the word “PROBABILITY”?
Vowels: O, A, I, I = 4 out of 11
4/11
You roll two dice. What is the probability the sum is 7?
6/36 or 1/6
You flip a coin and roll a die. What is the probability of getting heads and a number greater than 4?
½ × 2/6 = 2/12 = 1/6
A spinner has 3 green, 2 yellow, and 1 red section. What is the probability of not landing on red?
5/6
What is the probability of rolling two 3s with two dice?
1/36
You draw a card, do not replace it, and draw another. What is the probability both are aces?
4/52 × 3/51 = 12/2652 = 1/221
A bag contains 4 blue, 3 red, and 3 yellow marbles. What is the probability of drawing a blue or red marble?
7/10
A class has 12 boys and 18 girls. If a student is picked at random, what is the probability it’s a girl?
3/5
If you roll a die twice, what is the probability you roll at least one 6?
11/36
You get2 more points if you don't risk
YAY!
A spinner has 8 equal sections numbered 1 to 8. What is the probability of landing on a multiple of 3?
1/4
You flip three coins. What is the probability of getting exactly two heads?
Outcomes: HHT, HTH, THH → 3 out of 8
Answer: 3/8
Two cards are drawn from a deck without replacement. What is the probability both are black cards?
Black cards: 26/52 × 25/51 = 650/2652 = 25/102
Answer: 25/102
You roll a die three times. What is the probability you get all even numbers?
Even numbers: 2, 4, 6 → 3/6 = ½
➤ Answer: (½)³ = 1/8
In a bag of 5 red, 4 green, and 1 blue marble, what’s the probability of drawing two green marbles without replacement?
4/10 × 3/9 = 12/90 = 2/15
What is the probability of drawing 2 face cards in a row from a deck without replacement?
Face cards: 12 in total (J, Q, K of 4 suits)
➤ Answer: 12/52 × 11/51 = 132/2652 = 11/221