Simple Probability
If you were to roll a die one time what is the probability it will NOT land on a 1?
5/6
Rose has a spinner that is split into eight equal sections numbered 1 through 8. She spun the spinner 1,456 times. Which of the following would be a good estimate of the number of times the spinner landed on the number 6?
182
The chance of getting an even number when rolling a 6-sided die.
Equally likely
What is the probability of flipping a tail with a coin and rolling a four on a die?
1/12
The middle number.
Median
If you were to roll a die one time, what is the probability of it landing on an odd number?
3/6 or 1/2
Sam rolled a die 498 times. Which of the following would be a good estimate of the number of times she rolled the number 3 on the die?
83
Natalie will randomly choose one of the following days of the week to clean her bedroom:
Certain
What is the probability of flipping a coin and getting tails three times in a row?
1/8
The number that occurs the most.
What is the probability of showing tails on a coin?
1/2
Alica has heard her neighbor's car alarm go off two of the past six nights. Which of the following is the best prediction of the number of times the alarm will go off over the next 12 nights?
4
A bag contains 35 marbles, 34 of which are blue. If a marble is picked out at random, what is the likelihood of it being blue?
Likely
What is the probability if you spin a spinner numbered 1-8 two times, land on two the first time and land on a factor of 8 the second time?
4/64 or 1/16
The sum of all the values divided by the amount of numbers.
Mean
What is the probability of selecting an ace out of a standard deck of cards?
4/52 or 1/13
A bag contains an equal number of blue, green, pink, and red balls. If a ball is chosen at random 160 times, with replacement, predict the number of times the ball would be the color red.
40
There are 15 letter tiles in a bag: six tiles are labeled S, eight tiles are labeled R, and one is labeled M. Which of the following describes how likely it is to choose the letter M?
Unlikely
What is the probability of picking a blue marble, a green marble, and another blue marble (replacing it in the bag each time) from a bag of 2 blues, 4 reds, and 4 greens?
16/1000 or 2/125
Each object in a population has an equal chance of being pick.
Random Sample
What is the probability of selecting a day that starts with the letter S?
2/7
Jeff flipped a coin 470 times. What would be a good estimate of the number of times the coin landed on heads?
235
What is the probability of rolling a number which is greater than 6 on a fair die?
Impossible
There are six apples, five oranges, and one pear in John's basket. His friend takes three pieces of fruit at random without replacement. Determine the probability that all three fruits taken are apples.
120/1320 or 1/11
How spread out the data set is.
Variation