Theoretical vs Experimental
If you flip a coin 10 times, math says that it should land on heads 5 times. What type of probability is this?
Theoretical probability
What is the theoretical probability of rolling a 5 on a standard six sided die?
1/6
A drawer has 20 socks: 10 black, 6 white, and 4 blue. What is the probability, as a percent, of picking a blue sock?
4/20 or 1/5 or 20%
When rolling two dice, how many different ways can you roll a sum of 2?
only 1 way (1 and 1)
No it does not change the chances, indepdent events!
You roll a standard six sided die 20 times and it lands on a number 4 a total of 6 times. what type of probability is represented?
Experimental probability
A bagg contains 3 red marbles, 4 blue marbles, and 5 green marbles. What is the probability of randomly choosing a blue marble?
4/12
What is the probability of rolling a prime number on a standard six sided die?
Prime numbers are 2,3, and 5 so 3/6 so 1/2. Prime numbers can only be divided by 1 or themselves!
What is the probability of rolling "doubles" (the same number on both dice)?
what is 6/36? simplified 1/6
You flip a coin and roll a six sided die. what is the total number of possible outcomes in this sample space?
2 coin outcomes x 6 die outcomes = 12 possible outcomes!
According to theoretical probability, what is the exact probability of rolling an even number on a standard six sided die (answer as a simplified fraction or percent)
1/2 or 50%
A spinner is divided into 8 equal sections numbered 1 through 8. What is the probability of spinning a number greater than 5?
3/8
Out of a standard deck of 52 cards, what si the simplified fractional probability of drawing a Face Card (Jack, Queen, or King)?
12 face cards in total, so 12/52, so 3/13
what is the probability of rolling two dice and getting a sum of exactly 7?
1-6,2-5,3-4,5-2,4-3,6-1 so 6 possible ways so 6/36
You flip a coin and roll a standard die. what is the probability of flipping heads and rolling a 4?
According to the Law of Large Numbers, what happens to your experimental probability the more times you repeat an experiment?
It gets closer and closer to theoretical probability
In a standard deck of 52 playing cards, what is the probability of drawing a heart?
A word tile contains the letterrs in the word PROBABILITY. what is the probability of picking a vowel?
You spin a 3 section spinner (red, blue, yellow) and roll a standard die. what is the probability of spinning red and rolling an odd number?
1/3 x 3/6 =3/18 reduced to 1/6
If the probability of an event happening is 3/10, what is the probability of that event NOT happening?
7/10 or 70%
A jar holds red, blue, yellow candies. The probability of picking red is 1/4 and blue is 2/5. What is the probability of picking a yellow candy?
answer is 7/20. Find a common denominator. red 5/20, blue 8/20, so thats 13/20. remainder is 7/20!
a bag has 5 cards numbered 1 to 5. you draw a card, put it back, and draw a sescond card. what is the probability that both cards drawn are even numbers?
2/5 x 2/5 = 4/25