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Math Review Question: 6 Page: 297 Difficulty: medium

Counting property: We can arrange n unique items in n! ways There are 5 unique letters in STUDY, so we can arrange those letters in 5! ways

5! = (5)(4)(3)(2)(1) = 120

Answer: 120

Cheers, Brent
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Brent Hanneson – Creator of greenlighttestprep.com If you enjoy my solutions, you'll like my GRE prep course. Sign up for GRE Question of the Dayemails

Math Review Question: 6 Page: 297 Difficulty: medium

Alternate approach:

Take the task of seating the 6 students and break it into stages.

Stage 1: Select a letter to be the FIRST letter There are 5 letters to choose from, so we can complete stage 1 in 5 ways

Stage 2: Select a letter to be the SECOND letter There are 4 letters remaining to choose from, so we can complete this stage in 4 ways

Stage 3: Select a letter to be the THIRD letter There are 3 letters remaining to choose from, so we can complete this stage in 3 ways

Stage 4: Select a letter to be the FOURTH letter There are 2 letters remaining to choose from, so we can complete this stage in 2 ways

Stage 5: Select a letter to be the LAST letter There is 1 letter remaining to choose from, so we can complete this stage in 1 way

By the Fundamental Counting Principle (FCP), we can complete all 5 stages (and thus seat all 5 letters) in (5)(4)(3)(2)(1) ways (= 120 ways)

Answer: 120

Note: the FCP can be used to solve the MAJORITY of counting questions on the GMAT. So, be sure to learn

RELATED VIDEOS FROM MY COURSE

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Brent Hanneson – Creator of greenlighttestprep.com If you enjoy my solutions, you'll like my GRE prep course. Sign up for GRE Question of the Dayemails

Re: In how many different ways can the letters in the word STUDY [#permalink]
25 Nov 2019, 07:20

This question despite its math seriousness sounds a little bit funny. I'm really glad that I found an answer here but usually I use papersowl.com essay review for more information on how to do the right decision. And how you choose the difficultness of this question? Why it is medium? Where I can find more information or review about that? Anyway, thanks to a previous member for adding these helpful videos. Sometimes it is more understandable than a regular text.