GMAT Quantitative Reasoning Practice Test 1

Question : 100 of 100

Marks: +1, -0

One out of every 500 light bulbs are defected. If 2 out of every 10 defected light bulbs have a broken glass and there are 20 broken glass light bulbs in the shipment, how many light bulbs total are there in the shipment?

$2,000$
$5,000$
$10,000$
$50,000$
$52,000$

Validate

Solution:

Two out of every 10 damaged light bulbs have a broken glass, so if 20 bulbs have a broken glass, there are 100 damaged light bulbs. Since one out of every 500 is damaged, there are

100 × 500 = 50,000

light bulbs in the shipment.

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