Events & Promotions
|
|
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Apr 2610:00 AM EDT
-11:00 AM EDT
The Target Test Prep course represents a quantum leap forward in GMAT preparation, a radical reinterpretation of the way that students should study. Try before you buy with a 5-day, full-access trial of the course for FREE!
Apr 2711:00 AM EDT
-12:00 PM EDT
Prefer video-based learning? The Target Test Prep OnDemand course is a one-of-a-kind video masterclass featuring 400 hours of lecture-style teaching by Scott Woodbury-Stewart, founder of Target Test Prep and one of the most accomplished GMAT instructors
Apr 2808:00 AM PDT
-11:00 AM PDT
Whether you are just beginning your MBA journey or fine-tuning your path to a 700+ score, GMAT Day is designed to give you a competitive edge.
26 Jun 2018, 20:50
Kudos
Bookmarks
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
85% (01:54) correct
15%
(02:05)
wrong
based on 220
sessions
History
Date
Time
Result
Not Attempted Yet
Pens cost 70 cents each and pencils cost 40 cents each. If Iris spent $5.20 on a total of 10 pens and pencils, how many pencils did she purchase? ($1 = 100 cents)
(A) 4
(B) 6
(C) 8
(D) 10
(E) 13
(A) 4
(B) 6
(C) 8
(D) 10
(E) 13
26 Jun 2018, 21:52
Kudos
Bookmarks
Solution
Given:
- • Each pen costs 70 cents
• Each pencil costs 40 cents
• Iris spent $5.20 on a total of 10 pens and pencils
To find:
- • The number of pencils did Iris purchase
Approach and Working:
If we assume that Iris purchased n pencils, then
- • Number of pens that she purchased = 10 – n
As she spent $5.20 in total, we can write
- • 70 (10 – n) + 40 n = 520
Or, 700 – 70n + 40n = 520
Or, 30n = 180
Or, n = 6
Hence, the correct answer is option B.
Answer: B
27 Jun 2018, 04:52
Kudos
Bookmarks
Pens (x) + Pencil (y) = 10 -> eq (1)
70x + 40y = 520 -> eq(2)
----------------------
70x + 40y = 520
-40x - 40y = -400 (Multiply eq(1) with -40 on both sides )
--------------------------
30x = 120
x = 4
sub x in eq(1) and hence y = 6
Answer: B
70x + 40y = 520 -> eq(2)
----------------------
70x + 40y = 520
-40x - 40y = -400 (Multiply eq(1) with -40 on both sides )
--------------------------
30x = 120
x = 4
sub x in eq(1) and hence y = 6
Answer: B
