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02 Jan 2018, 23:44
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
78% (02:38) correct
22%
(02:55)
wrong
based on 73
sessions
History
Date
Time
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Not Attempted Yet
Sam, Mark and Joe work every day of the week, and each works the same number of hours as he did the day before. In 7 days, they earn $252 in total. If each receives the same rate per person per hour, and Mark worked twice as many hours as Sam and Joe worked three times as many hours as Mark, how much money does Mark earn in 5 days?
A. $24
B. $30
C. $36
D. $40
E. $50
A. $24
B. $30
C. $36
D. $40
E. $50
03 Jan 2018, 01:22
Kudos
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Let Sam worked = x hrs in a 7 days
Mark worked = 2x hr
Joe worked = 6x hr
S:M:J = 1:2:6
Mark's contribution = 2/(1+2+6)
Total amount earned = $252
Mark' Amount = 2/9*252 = $56
Mark's amount for 5 days = 5/7*56= $40
Ans D
Mark worked = 2x hr
Joe worked = 6x hr
S:M:J = 1:2:6
Mark's contribution = 2/(1+2+6)
Total amount earned = $252
Mark' Amount = 2/9*252 = $56
Mark's amount for 5 days = 5/7*56= $40
Ans D
05 Mar 2018, 01:38
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S+M+J=$252/7 so we get per day.. (1)
S+M+J=$36 per day
M=2S… S=M/2..(2)
J=3M.. (3)
Substitute (2) and (3) in (1) and solve for M: M/2+3M+M=$36…..M=$8 per day, so in 5 days M will earn $40. Answer D
S+M+J=$36 per day
M=2S… S=M/2..(2)
J=3M.. (3)
Substitute (2) and (3) in (1) and solve for M: M/2+3M+M=$36…..M=$8 per day, so in 5 days M will earn $40. Answer D
