Lesson: Intermediate Problem Solving - 20t01

Practice: Unlikely Answer Choices

[Page 20 of 27]
Use your knowledge of unlikely or trap answers to identify the culprit choices in the following question, then select the correct answer and then click Continue.

The price of a certain stereo is discounted by 10 percent, and the reduced price is then discounted by 25 percent. This series of successive discounts is equivalent to a single discount of
28.00%
31.50%
32.50%
34.00%
35.00%

Choice (E), 35.00%, is equal to the sum of the two discount percents. However, this problem (and many Problem Solving percent questions) involves a successive percent change. This means we must find the price of the stereo after the first discount, and then apply the second discount to the new price. We cannot simply add the individual percents. Choice (E) is a trap answer.

Choice (C) is correct. Picking 100 as the original price of the stereo, we find:

Price after first discount: $100 × 0.10 = $10; $100 – $10 = $90

Price after second discount: $90 × 0.25 = $22.50; $90 – $22.50 = $67.50

Total discount: $100 – $67.50 = $32.50; $32.50 is 32.50% of $100.

Back Next

Next to display next topic in the chapter.

Video Lessons and 10 Fully Explained Grand Tests

Large number of solved practice MCQ with explanations. Video Lessons and 10 Fully explained Grand/Full Tests.

Quantitative Aptitude Reasoning English General Knowledge Picture Patterns
More for You
MCQ with question Explanations Scholarships and Financial Aid

Graphs - Data Interpretation

Lessons and practice questions for Data Interpsection - Graphs

Arithmetic

Lessons on Basic to Advance Arithmetic with practice questions

GMAT CAT

What is GMAT CAT? How to deal with CAT - Computer Adopted Test

All in this Category

You may be interested in

Colleges in cities of Balochistan

Comprehensive lists of colleges in ...

Colleges in Peshawar

Find a comprehensive list of major ...

Boost your Memory

Concrete methods to improve memory. ...

Study in Canada

How to get opportunity to study in ...

Pakistan Army Selection and Recruitment Tests

Join Pakistan Army. How it is possi ...

ISSB Tests

Learn about ISSB - Armed forces rec ...

Universities in Peshawar

A comprehensive list of universitie ...

AU - Air University

How to get admission in Air Univers ...

About us

EntryTest.com is a test preparation service for students seeking successful career.

About Disclaimer

Quick Test Prep

NUST NET IBA Karachi SAT LUMS LCAT LSE

 

NTS GAT NTS NAT GMAT GRE ACT

Study Abroad

Education Abroad Business Schools MS in USA