Post your question in the Comment section below, and I’ll answer it as fast as humanly possible.

- Video Course
- Video Course Overview
- General GRE Info and Strategies - 7 videos (free)
- Quantitative Comparison - 7 videos (free)
- Arithmetic - 42 videos
- Powers and Roots - 43 videos
- Algebra and Equation Solving - 78 videos
- Word Problems - 54 videos
- Geometry - 48 videos
- Integer Properties - 34 videos
- Statistics - 28 videos
- Counting - 27 videos
- Probability - 25 videos
- Data Interpretation - 24 videos
- Analytical Writing - 9 videos (free)
- Sentence Equivalence - 39 videos (free)
- Text Completion - 51 videos
- Reading Comprehension - 16 videos

- Study Guide
- Your Instructor
- Office Hours
- Extras
- Prices

## Comment on

Choose R Employees## Thank you for the videos! It

## Amazing new tricky problem !!

## I didn't even do any

## Even though you reached the

Even though you reached the correct answer, your rationale would have messed you up if the question had read "....there are 20 ways to choose R employees"

In the original question, the correct answer is D since 6C2 = 15 (i.e., R = 2) and 6C4 = 15 (i.e., R = 4).

However, if we know that 6CR = 20, then we can be certain that R = 3

## Add a comment