A box contains 10 light bulbs, fewer than half of which are defective. Two bulbs are to be drawn simultaneously from the

Source: GMAT Paper Tests

A box contains 10 light bulbs, fewer than half of which are defective. Two bulbs are drawn simultaneously from the box. If n of the bulbs in the box are defective, what is the value of n?

1) The probability that the two bulbs to be drawn will be defective is $\dfrac{1}{15}$

2) The probability that one of the bulbs to be drawn will be defective and the other will not be defective is $\dfrac{7}{15}$

The OA is D

Quote

Post new topic Post Reply

• Page 1 of 1

5/5

5 Star (480 Reviews)

"Target Test Prep is the closest to the official version of the GMAT exam, about 99% accuracy in terms of the quality and quantity of information. The course has excellently created singular sets of focused lessons and tests for every possible topic that one could come across in the official GMAT exam."

"The TTP course maximizes the efficiency of the time you spend studying. It will take time and effort but I could almost guarantee that if you complete the course exactly as it is laid out you will get an amazing score. They also have a very responsive team willing to help with any questions you might have."

"TTP has two things that I think no other test prep company offers: A teaching approach that reinforces understanding and an attitude that will give you the mental preparedness needed to succeed on the test. TTP gives you a deep understanding of the concept you need to know while teaching you how to think."

Write a Review