Chapter 6-7 OST Review (7th Grade)

Bob purchases a $40 item at a store. He uses a coupon to receive a 35% discount, and he pays 8% sales tax on the item. How much money does Bob owe after receiving the discount and paying the sales tax?

• $28.46

• $28.08

• $32.24

• $27.92

Mike has a coupon for an additional 15% off of the sale price of any item in a store. He uses his coupon to buy a shirt whose sale price is already 20% off the original price. He pays $14.96, and there is no sales tax. What is the original price of the shirt? (only write the number, don't label)

Pete and Susan each put in the same amount of money in a new bank account. Susan's account earns 2.75% simple interest, and she earned $2.20 interest after one year. Pete's account earns 10% simple interest. How much interest did Pete earn in his account after 3 years?

• $24

• $4

• $16

• $30

Sam is collecting money for an animal shelter. He collects $250.00 each day for 8 days. The shelter will use 30% of the money he collects to buy pet food. The rest of the money will be used to buy cleaning supplies. How much of the money that Sam collects will be used to buy cleaning supplies?

• $890

• $1,400

• $585

• $1,296

A company collects data on its employees. It finds that

30% of the employees in each department are part-time,

70% of the employees in each department are full-time, and

each of the company's four departments has 60 employees.

How many part-time employees does the company have? (don't label, number only)

A company collects data on its employees. It finds that

25% of the employees in each department are part-time,

75% of the employees in each department are full-time, and

each of the company's five departments has 80 employees.

How many full-time employees does the company have? (don't label, number only)

Jeremy places an order for 300 headsets from a supplier for his store. The cost of each headset is $54.50. Jeremy pays 30% of the total amount at the time of placing the order. He needs to pay the remaining amount at the time of delivery. What does Jeremy need to pay at the time of delivery?

• $11,445

• $8,950

• $13,225

• $9,975

Zayne has a bag filled with coins. The bag contains 7 quarters, 8 dimes, 3 nickels, and 9 pennies. He randomly chooses a coin from the bag. What is the probability that Zayne chooses a dime or a penny?

• 37%

• 63%

• 46%

• 51%

A gumball machine contains equal numbers of red, yellow, orange, green, and blue gumballs. It randomly gives out one gumball for each pull at the machine. What is the probability of getting a red or orange gumball from one pull at the machine?

• 50%

• 60%

• 40%

• 35%

Joe designs a weighted number generator that produces the integers 0-4. He then runs the generator 500 times. The results are shown in the table. If Joe runs the generator a total of 4,000 times, which is the closest to the expected number of times the integer 2 is produced?

• 832

• 946

• 736

• 988