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Kim purchased n items from a catalog for $8 each.

This topic has 2 expert replies and 0 member replies

Kim purchased n items from a catalog for $8 each.

Post Wed Nov 08, 2017 7:56 am
Kim purchased n items from a catalog for $8 each. Postage and handling charges consisted of $3 for the first item and $1 for each additional item. Which of the following gives the total dollar amount for Kim’s purchase, including postage and handling, in terms of n ?

(A) 8n + 2
(B) 8n + 4
(C) 9n + 2
(D) 9n + 3
(E) 9n + 4

The OA is C.

I am confused. I thought the correct answer should be A. Why is C?

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Post Wed Dec 13, 2017 7:35 am
VJesus12 wrote:
Kim purchased n items from a catalog for $8 each. Postage and handling charges consisted of $3 for the first item and $1 for each additional item. Which of the following gives the total dollar amount for Kim’s purchase, including postage and handling, in terms of n ?

(A) 8n + 2
(B) 8n + 4
(C) 9n + 2
(D) 9n + 3
(E) 9n + 4
Since Kim purchased n items from a catalog, we can create the following expression:

8n + 3 + 1(n - 1) = 8n + 3 + n - 1 = 9n + 2

Answer: C

_________________
Jeffrey Miller Head of GMAT Instruction

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Post Wed Nov 08, 2017 10:13 am
VJesus12 wrote:
Kim purchased n items from a catalog for $8 each. Postage and handling charges consisted of $3 for the first item and $1 for each additional item. Which of the following gives the total dollar amount for Kim’s purchase, including postage and handling, in terms of n ?

(A) 8n + 2
(B) 8n + 4
(C) 9n + 2
(D) 9n + 3
(E) 9n + 4

The OA is C.

I am confused. I thought the correct answer should be A. Why is C?
Hi VJesus12,
Let's take a look at your question.

Let's first find the total purchase price.
Kim purchased n items for $8 each, therefore, the total purchase price of n items is 8n.

Now, let's find the postage and handling charges of n items, which is $3 for the first item and $1 for each additional item.
Total postage and handling charges = 3 + 1*(n-1) = 3 + n - 1 = n + 2

Total dollar amount of Kim’s purchase, including postage and handling = Purchase price + total postage and handling charges
= 8n + n + 2 = 9n + 2

Therefore, Option C is correct.

Hope it helps.
I am available if you'd like any follow up.

_________________
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