Probability
A quarter is tossed 2 times. What is the probability the quarter will land tails side up both times it is tossed?
.25
What is 35% of 250?
Show your work!
87.5
Use the distributive property on the following:
3(1+4X)
3+12X
Find the mean of this data set:
17, 15, 23, 12, 16
16.6
C=πd Or C=2πr
There are 20 pieces of candy in a bag. 5 of the candies are chocolate with peanut butter, 10 are sour candies, 3 are chocolate candies without peanut butter, and 2 are lollipops. What is the probability of randomly selecting a piece of candy that is chocolate without peanut butter.
3/20=15%
What percentage of 600 is 24?
4%
Write an expression equivalent to X+X+X-1.4X
1.6X
Find the median, range, and mode of this data set:
2,3,5,5,6,9,11,14
median- 5.5 range- 12 mode- 5
-14 + 27
A baker made 24 different kinds of pastries. 6 of these pastries had chocolate filling. What is the probability that someone would randomly select a pastry with chocolate filling.
1/4
Sally wanted to buy a dress for the spring concert. The cost of the dress is $43.99. Sally has a coupon for 20% off her purchase. She has 34 dollars in her wallet. Does Sally have enough money to buy the dress?
Yes. The dress will cost $32.99, therefore she can buy the dress.
Vincent has a rewards card for the local coffee shop. He gets 10 points just for signing up to be a card holder. He earns 5 points every time he buys something from the shop. He needs 40 points to receive a free large coffee. Write an inequality to show the minimum amount of times he will need to buy something to receive the free coffee.
40≤5X+10
Find the first quartile, the third quartile, and the interquartile range of this data set. Create a box and whisker plot.
3, 5, 8, 10, 13, 15
Interquartile- 9
A cookie recipe requires 3/4 cup of flour and 1/3 cup of butter to make one batch of cookies. Wendy has 2 cups of flour and 3/4 cup of butter. What is the greatest number of batches she can make?
She has enough butter and flour to make 2 1/4 batches of cookies.
a 4 section spinner was spun 80 times. The spinner landed on each section as follows: Pink- 10 times, Yellow- 26 times, Violet- 39 times, and Green- 5 times. What is the probability of the spinner landing on Yellow?
13/40
There are 20 classrooms on the second floor of the middle school. 40% of the classrooms are 6th grade. How many classrooms could be 7th or 8th grade?
There are 12 classrooms that could be for 7th or 8th grade.
The middle school hosted a find raiser to help them buy new chrome books. 6th grade raised $250. 7th grade raised $125.50 more than 6th grade. 8th grade raised $73 less than 7th grade. How much money did the middle school raise altogether.
$928
A group of four friends likes to bowl together, and each friend keeps track of his all-time highest score in a single game. Their high scores are all between 180 and 220, except for Adam, whose high score is 250. Adam then bowls a great game and has a new high score of 290. How will increasing Adam's high score affect the mean and median?
The mean will increase, but the median will stay the same.
A scale drawing for a construction project uses a scale of 1 inch = 4 feet. The dimensions of the rectangular family room on the scale drawing are 7.5 inches by 12 inches. What will be the actual area of the floor of the family room after the construction project is completed?
1440 square feet
A 6 sided dice was used in a family game night. The dice was rolled 108 times during the first game. Of those 108 times, a 4 was rolled a total of 12 times. The same dice was rolled 81 times during second game. How many times did the dice most likely roll a 4 during the second game?
9 times.
Randall will pay $102.
Make this equation true:
-3.7+4.3 = 1- _____
.4
Find the mean, median, mode, and range of this data set:
4, 6, 10, 25, 2, 4, 17, 4, 13, 21, 9, 3, 3, 4, 25, 3, 6
mean - 9.4 median- 6 mode- 4
range - 23
Give the sample space to show all possible outcomes for tossing three coins one time, using the letter H when a coin faces “heads” up, and the letter T when it faces “tails” up. Based on your answer, how many outcomes consist of 3 heads or 3 tails?
H H H T T T H H T T T H H T H T H T T H H H T T
2