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. 30

B. 25

C. 20

D. 35

Answer: Option A

Solution (By JKSSB Mock Tests)

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

40% failed in Physics, 30% in Chemistry, 20% in both. % passed in both:

A. 40%

B. 60%

C. 30%

D. 50%

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option D

Explanation:
Failed at least one = 40+30-20=50%, passed both = 50%.

This question belongs to: Maths Percentage

Question #2

If the numerator of a fraction is increased by 20% and its denominator is decreased by 10%, the fraction becomes 3/5. Find the original fraction.

A. 7/15

B. 4/7

C. 9/20

D. 2/5

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option C

Explanation:
Let original = N/D. (1.2N)/(0.9D) = (4/3)(N/D) = 3/5 → N/D = (3/5)×(3/4) = 9/20.

This question belongs to: Maths Percentage

Question #3

What is 75% of 120?

A. 60

B. 100

C. 90

D. 80

View Answer & Solution Discuss

Get Complete Subject PDF for Maths

Correct Answer: Option C

Explanation:
75% of 120 = (75 / 100) * 120 = 90.

This question belongs to: Maths Percentage

Explore All Percentage MCQs