Question

Which of these is a lower unit price than 8 items for $15?

a 3 items for $7
b 5 items for $9
c 10 items for $20
d 12 items for $25

Answer 1

After calculating the unit price for each option, it's determined that option b, which is 5 items for $9 with a unit price of $1.80, has a lower unit price than 8 items for $15 (unit price $1.875).

Step-by-step explanation:

The question involves comparing unit prices to determine which option provides a lower unit price than 8 items for $15. Here are the calculations for each option's unit price:

• Option a: 3 items for $7, unit price = $7 / 3 = $2.33 approximately.
• Option b: 5 items for $9, unit price = $9 / 5 = $1.80.
• Option c: 10 items for $20, unit price = $20 / 10 = $2.00.
• Option d: 12 items for $25, unit price = $25 / 12 = $2.08 approximately.

The original unit price is $15 / 8 = $1.875. Comparing this with the options:

• Option a's unit price of $2.33 is higher.
• Option b's unit price of $1.80 is lower.
• Option c's unit price of $2.00 is higher.
• Option d's unit price of $2.08 is higher.

Hence, the answer is option b: 5 items for $9, which has a unit price lower than 8 items for $15.