salary

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ketkoag: Legendary Member; Posts: 876; Joined: Thu Apr 10, 2008 8:14 am; Thanked: 13 times

salary

by ketkoag » Fri Apr 24, 2009 3:02 am

At a certain company, each employee has a salary grade s that is at least 1 and at most 5. Each employee receives an hourly wage p, in dollars, determined by the formula p = 9.50 + 0.25(s – 1). An employee with a salary grade of 5 receives how many more dollars per hour than an employee with a salary grade of 1?
A. $0.50
B. $1.00
C. $1.25
D. $1.50
E. $1.75

IMO: B OA : C
please confirm whether my answer is correct..

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Source: Beat The GMAT — Problem Solving | Fri Apr 24, 2009 3:02 am

shibal: Master | Next Rank: 500 Posts; Posts: 345; Joined: Wed Mar 18, 2009 6:53 pm; Location: Sao Paulo-Brazil; Thanked: 12 times; GMAT Score:660

by shibal » Fri Apr 24, 2009 5:04 am

i got B too.... are u sure OA is C

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rossmj: Senior | Next Rank: 100 Posts; Posts: 60; Joined: Thu Feb 26, 2009 12:50 pm; Location: Chicago; Thanked: 3 times

by rossmj » Fri Apr 24, 2009 7:27 am

Definitely B. There is either an error in the OA or in the question. Be careful what sources you use for prep.

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doclkk: Master | Next Rank: 500 Posts; Posts: 180; Joined: Tue Apr 07, 2009 3:46 pm; Thanked: 5 times; Followed by:2 members

Re: salary

by doclkk » Fri Apr 24, 2009 7:34 am

ketkoag wrote:At a certain company, each employee has a salary grade s that is at least 1 and at most 5. Each employee receives an hourly wage p, in dollars, determined by the formula p = 9.50 + 0.25(s – 1). An employee with a salary grade of 5 receives how many more dollars per hour than an employee with a salary grade of 1?
A. $0.50
B. $1.00
C. $1.25
D. $1.50
E. $1.75

IMO: B OA : C
please confirm whether my answer is correct..

B for sure.

I've done the problem forwards and backwards. IT would be 1.25 if the grade was 6.

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vittalgmat: Legendary Member; Posts: 621; Joined: Wed Apr 09, 2008 7:13 pm; Thanked: 33 times; Followed by:4 members

Re: salary

by vittalgmat » Fri Apr 24, 2009 3:05 pm

ketkoag wrote:At a certain company, each employee has a salary grade s that is at least 1 and at most 5. Each employee receives an hourly wage p, in dollars, determined by the formula p = 9.50 + 0.25(s – 1). An employee with a salary grade of 5 receives how many more dollars per hour than an employee with a salary grade of 1?
A. $0.50
B. $1.00
C. $1.25
D. $1.50
E. $1.75

IMO: B OA : C
please confirm whether my answer is correct..

The problem asks for the difference in salary between grade 5and 1.
Looking at the problem we can immediately conclude that the constant 9.5 is not required as it will get cancelled. So no need to use it in calculation.

So lets deal with the variables only.
.25(5 -1) - .25(1 -1)
= 0.25 *4 = $1.

Answer is B.