The price of a commodity is increased by x% then decreased by x%. Net decrease is 9%. Find x. MCQ with Answer and Explanation

Question

Share Report Error

The price of a commodity is increased by x% then decreased by x%. Net decrease is 9%. Find x.

A. 35

B. 20

C. 30

D. 25

Answer: Option C

Solution (By JKExamLibrary)

1 - x²/10000 = 0.91 → x² = 900 → x = 30.

This question belongs to: Maths Percentage

Request complete Subject PDF

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Percentage Questions

Question #1

Salary increased by 20% then decreased by 20%. Net effect:

A. 4% increase

B. 2% decrease

C. 4% decrease

D. No change

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option C

Explanation:
1.2 × 0.8 = 0.96, 4% decrease.

This question belongs to: Maths Percentage

Question #2

A number divided by 5, quotient increased by 20% then decreased by 20% gives 480. Number:

A. 2000

B. 2400

C. 2500

D. 2200

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option C

Explanation:
(N/5)×1.2×0.8=480 → (N/5)×0.96=480 → N/5=500 → N=2500.

This question belongs to: Maths Percentage

Question #3

Two successive discounts of 20% and 10% on Rs. 2000 give final price:

A. 1500

B. 1440

C. 1400

D. 1360

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option B

Explanation:
2000 × 0.8 × 0.9 = 1440.

This question belongs to: Maths Percentage

Explore All Percentage MCQs