GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 13 Oct 2019, 20:28

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# A certain seafood restaurant gets a delivery of fresh seafood

Author Message
TAGS:

### Hide Tags

Senior Manager
Status: Gathering chakra
Joined: 05 Feb 2018
Posts: 433
A certain seafood restaurant gets a delivery of fresh seafood  [#permalink]

### Show Tags

06 Feb 2019, 18:07
1
00:00

Difficulty:

35% (medium)

Question Stats:

70% (01:55) correct 30% (02:01) wrong based on 40 sessions

### HideShow timer Statistics

A certain seafood restaurant gets a delivery of fresh seafood every day of the week. If the delivery company charges $$d$$ dollars per delivery and $$c$$ cents per delivered item and the restaurant has an average (arithmetic mean) of $$x$$ items delivered per day, then which of the following is an expression for the total cost, in dollars, of one week’s deliveries?

A) $$\frac{7cdx}{100}$$

B) $$d+\frac{7cx}{100}$$

C) $$7d+\frac{xc}{100}$$

D) $$7d+\frac{7xc}{100}$$

E) $$7cdx$$

I tried to write the equation instead of choosing numbers. Got tripped up on C as mentioned below, because I forgot to multiply the average x by 7 (since x is avg per day, and we need per week). Sad!

Official explanation:
Since the answer choices contain variables, this is a good place to Plug In. Let’s make d = 10, c = 200 (a particularly helpful number, because it allows us to work the problem in whole dollar amounts), and x = 5. If the restaurant has an average of 5 items per day delivered, then it had a total of 35 items delivered for the week. Multiplied by the 200 cents (or $2) charge per item, that’s a total of$70 in per-item charges. When we add that amount to the $70 total for the per-delivery charges—7 deliveries at$10 per delivery—we get a total of \$140 for the week. Our target answer, then, is 140; only (D) gives us 140 when we plug our values into our answer choices, and, therefore, (D) is the correct answer.

If you got (C), by the way, check your calculations for your target answer. You likely calculated the per-item charges as though x were the total, rather than the daily average, of the items delivered.
NUS School Moderator
Joined: 18 Jul 2018
Posts: 1028
Location: India
Concentration: Finance, Marketing
WE: Engineering (Energy and Utilities)
Re: A certain seafood restaurant gets a delivery of fresh seafood  [#permalink]

### Show Tags

06 Feb 2019, 20:14
Cost of the items delivered is cx. for 7 days it is 7cx. Now, this is cents. converting it to dollars gives 7xc/100.
Also, the delivery company charges d dollars per day, then for 7 days, its 7d.
Total = 7d+7xc/100

_________________
Press +1 Kudos If my post helps!
Target Test Prep Representative
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 8040
Location: United States (CA)
Re: A certain seafood restaurant gets a delivery of fresh seafood  [#permalink]

### Show Tags

16 May 2019, 20:00
energetics wrote:
A certain seafood restaurant gets a delivery of fresh seafood every day of the week. If the delivery company charges $$d$$ dollars per delivery and $$c$$ cents per delivered item and the restaurant has an average (arithmetic mean) of $$x$$ items delivered per day, then which of the following is an expression for the total cost, in dollars, of one week’s deliveries?

A) $$\frac{7cdx}{100}$$

B) $$d+\frac{7cx}{100}$$

C) $$7d+\frac{xc}{100}$$

D) $$7d+\frac{7xc}{100}$$

E) $$7cdx$$

Since each delivered item costs c/100 dollars, the total weekly delivery cost of delivering x items per day, plus the d dollar delivery charge per delivery is 7(d + (c/100) * x) = 7d + 7cx/100 dollars.

_________________

# Scott Woodbury-Stewart

Founder and CEO

Scott@TargetTestPrep.com
122 Reviews

5-star rated online GMAT quant
self study course

See why Target Test Prep is the top rated GMAT quant course on GMAT Club. Read Our Reviews

If you find one of my posts helpful, please take a moment to click on the "Kudos" button.

Re: A certain seafood restaurant gets a delivery of fresh seafood   [#permalink] 16 May 2019, 20:00
Display posts from previous: Sort by