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09 Oct 2019, 02:33
Kudos
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
91% (01:09) correct
9%
(01:39)
wrong
based on 583
sessions
History
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Not Attempted Yet
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) $155
(B) $160
(C) $164
(D) $172
(E) $185
(A) $155
(B) $160
(C) $164
(D) $172
(E) $185
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09 Oct 2019, 06:04
Kudos
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ANS A
Fixed cost for 1 hour = $200
Let, extra hours taken be = y
therefore, 200 + 150x = 1550
150x = 1350
x = 9
total hours = x +1 = 9+1 = 10
total fees = 1550
mean = total fees/ total hours ---> 1550/10 -----> $155per hour on average was charged.
Fixed cost for 1 hour = $200
Let, extra hours taken be = y
therefore, 200 + 150x = 1550
150x = 1350
x = 9
total hours = x +1 = 9+1 = 10
total fees = 1550
mean = total fees/ total hours ---> 1550/10 -----> $155per hour on average was charged.
09 Oct 2019, 09:18
Kudos
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Bunuel
Additional Hours taken by the client is 1550 - 200/150 = 9
Thus, Total time taken by the client is 9 + 1 = 10 HOurs....
So, Average charge per hour is 1550 / 10 = 155 , Answer must be (A)
