Question

an ice - skating rink kept track of which ice skates customers rented.
ice - skate rentals

	figure skates	hockey skates
adults	70	30

based on the table, which statement is true?
half the customers rented hockey skates.
a total of 100 customers were surveyed.
of all the customers, 15% rented hockey skates and are adults.
of the children, 25% rented figure skates.

Explanation:

Step1: Calculate total number of customers

$50 + 50+70 + 30=200$

Step2: Calculate number of hockey - skate renters

$50 + 30 = 80$

Step3: Calculate percentage of hockey - skate renters

$\frac{80}{200}\times100\%=40\%
eq50\%$

Step4: Check total number of surveyed customers

Total is 200, not 100

Step5: Calculate percentage of adult hockey - skate renters

$\frac{30}{200}\times100\% = 15\%$

Step6: Calculate percentage of children figure - skate renters

$\frac{50}{50 + 50}\times100\%=50\%
eq25\%$

Answer:

Of all the customers, 15% rented hockey skates and are adults.