0/1 of 40
Q. A quality control selects 7 lightbulbs at random for inspection out of every 400 lightbulbs produced. At this rate, how many lightbulbs will be inspected if the factory produces 20,000 lightbulbs?
a. 300
b. 350
c. 400
d. 450
e. 500
Skip
0 90 TRUE

MATH PRACTICE TEST