For every 144 light bulbs produced, 6 are defective. Find the number of defective light bulbs that could be expected out of 720.

Question

Responses
A 30 bulbs30 bulbs
B 35 bulbs35 bulbs
C 40 bulbs40 bulbs
D 45 bulbs45 bulbs
E 50 bulbs

Answer 1

To find the number of defective light bulbs that could be expected out of 720, we first need to find the proportion of defective light bulbs in a sample of 144.

Given that for every 144 light bulbs produced, 6 are defective, we can set up a proportion:

6 defective light bulbs / 144 light bulbs = x defective light bulbs / 720 light bulbs

Cross-multiplying, we get:

6 * 720 = 144 * x

4320 = 144x

Dividing both sides by 144, we find:

x = 4320 / 144
x = 30

Therefore, the number of defective light bulbs that could be expected out of 720 is 30 bulbs.

Therefore, the correct answer is option A) 30 bulbs.