Solve.
-In a sample of 75 fluorescent bulbs, 3 were found to be defective. At this rate, how many defective bulbs should be found in 525 bulbs?
A) 23
B) 20
C) 22
D) 21

Question

Quizplus · Accepted Answer

The rate of defective bulbs is 3 out of 75. To find the expected number of defective bulbs in 525 bulbs, set up a proportion: $3/75 = x/525$. Solving for $x$ gives $x = (3*525)/75 = 21$.

Solve. -In a Sample of 75 Fluorescent Bulbs, 3 Were Found