Percentages
2% of the students at Hamilton Middle School have red hair. There are 700 students at Hamilton Middle School.
How many students at Hamilton Middle School have red hair?
14
Of the 50 U.S. states, 4 have names that start with the letter W.
What percentage of U.S. states have names that start with the letter W?
8%
What is the median of the data ?
70 100 60 50 80 90 90 90 90
90
The numbers 4, 64, 22, 7, 34, and 9 are written on pieces of paper and placed in a bag. A piece of paper is chosen randomly out of the bag. How likely is it that the number on the paper will be an even number?
A. impossible B. unlikely
C. likely D. certain
likely
A spinner is divided into 8 equal parts labeled 1 through 8. What is the probability of the spinner landing on a number greater than 5?
3/8 0.375 37.5%
An item is marked down 15%, the sale price is $127.46. What was the original price?
$149.95
Darren is on a super effective diet. He has lost 16% percent of his weight this month.
If he started with 75 kg how much does he weigh now?
63
The test scores for the students in Mr. Miller’s math class are shown here.
52, 61, 69, 76, 82, 84, 85, 90, 94
What is the range of the test scores?
42
Maria will flip a coin 300 times and record her results. About how many times could Maria expect the coin to land on tails?
150
Jane wants to pick out an outfit for the school dance. She can choose from 3 pairs of pants, 5 shirts, and 2 pairs of shoes. How many different outfits does Jane have to choose from?
30
The manager at Jessica's Furniture Store is trying to figure out how much to charge for a couch that just arrived. The couch was bought at a wholesale price of $113.00 and Jessica's Furniture Store marks up all furniture by 45%. At what price should the manager sell the couch?
$163.85
Suppose a certain item used to sell for seventy-five cents a pound, you see that it's been marked up to eighty-one cents a pound. What is the percent increase?
8%
What is the MAD of this data ? Round to the nearest hundredth.
7, 14, 15, 9, 11, 14, 11, 10, 17
2.67
Robert will roll a number cube, labeled 1 through 6, a total of 200 times. About how many times could Robert expect to roll a number greater than 4?
66
Anthony rolls two number cubes, each numbered 1 to 6. What is the probability that he will roll an even number and then an odd number ?
A. 1/2 B. 1/4
C. 1/3 D. 3/4
1/4
A golf shop pays its wholesaler $40 for a certain club, and then sells it to a golfer for $75. What is the markup rate?
87.5%
A shoe store uses a 40% markup on cost. Find the cost of a pair of shoes that sells for $63.
45
This shows the scores of Jackson's football games this season. What is the Interquartile Range ? (IQR)
31 18 28 22 30 26
8
Jamal, Gary, Charlie, and Brian are going to stand in a line, one behind the other. In how many different ways can they stand in the line?
24
There are 5 red and 3 green marbles in a bag. One marble is randomly pulled from the bag and replaced. Then a second marble is pulled from the bag and replaced. What is the probability that both marbles pulled out are red?
25/64
An item that regularly sells for $425 is marked down to $318.75. What is the discount rate?
25%
Suppose you bought something that was priced at $6.95, and the total bill was $7.61. What is the sales tax rate in this city?
(Round answer to one decimal place.)
9.5%
These lists show the number of points two teams scored in five games.
Team 1: 51 47 35 48 64
Team 2: 27 55 53 38 41
What is the difference in the mean absolute deviation of the two teams?
2.16
Cody has 2 number cubes each labeled 1 to 6. After each roll, he multiplies the numbers showing on the cubes. If Cody rolls the cubes 396 times, how many times can he expect a product greater than 24?
44
Three coins will be tossed in the air at the same time. What is the probability that all three coins will land showing heads?
1/8