A lawyer charges her clients $\$200$ for the first hour of her time and $\$150$ for each additional hour. If the

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AAPL: Moderator; Posts: 2353; Joined: Sun Oct 29, 2017 2:08 pm; Followed by:2 members

A lawyer charges her clients $\$200$ for the first hour of her time and $\$150$ for each additional hour. If the

by AAPL » Tue Oct 04, 2022 10:58 am

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A lawyer charges her clients $\$200$ for the first hour of her time and $\$150$ for each additional hour. If the lawyer charged her new client $\$1,550$ for a certain number of hours of her time, how much was the average (arithmetic mean) charge per hour?

A. $\$150$
B. $\$160$
C. $\$164$
D. $\$172$
E. $\$185$

OA A

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gmatter2012: Master | Next Rank: 500 Posts; Posts: 136; Joined: Sat May 05, 2012 7:03 pm; Thanked: 1 times

Re: A lawyer charges her clients $\$200$ for the first hour of her time and $\$150$ for each additional hour. If the

by gmatter2012 » Fri Oct 14, 2022 8:07 pm

kindly post the question correctly . Option A is 155 not 150 !
https://gmatclub.com/forum/a-lawyer-cha ... 07627.html

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Scott@TargetTestPrep: GMAT Instructor; Posts: 7461; Joined: Sat Apr 25, 2015 10:56 am; Location: Los Angeles, CA; Thanked: 43 times; Followed by:29 members

Re: A lawyer charges her clients $\$200$ for the first hour of her time and $\$150$ for each additional hour. If the

by Scott@TargetTestPrep » Thu Dec 15, 2022 6:45 pm

AAPL wrote: ↑
Tue Oct 04, 2022 10:58 am
GMAT Prep

A lawyer charges her clients $\$200$ for the first hour of her time and $\$150$ for each additional hour. If the lawyer charged her new client $\$1,550$ for a certain number of hours of her time, how much was the average (arithmetic mean) charge per hour?

A. $\$150$
B. $\$160$
C. $\$164$
D. $\$172$
E. $\$185$

OA A

We can let n = the total number of hours of the lawyer’s service to her client and create the equation:

1550 = 200 + 150(n - 1)

1350 = 150n - 150

1500 = 150n

10 = n

Thus, the average charge per hour was 1550/10 = 155 dollars.

Answer: A

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