SSC GD 2019 PYQ — Question 75

SSC GD Constable (English) - 9th March 2019 Shift 2 • Quantitative Aptitude • Q75

A shopkeeper organizes sale on Friday, offering a discount of 23% on all items. Still, he makes a profit of 10% only. By how much percentage CP was lower than MP?

Show answer & explanation

Correct answer: D

Explanation

The correct answer is option 4 i.e. 30%

we know that,

Profit% (P) is the successive of marked up% (M) and discount% (D),

So,

⇒ M - D - (M × D)/100 = 10

⇒ M - 23 - (23M)/100 = 10

⇒ M - 23M/100 = 33

⇒ 77M/100 = 33

⇒ M = 42.85%

So, marked up price is 42.85% higher than Cost price.

We also know that,

If the value of an item up by x%, the percentage reduction to be now made
to bring it back to original level is [100x/(100 + x)]%

⇒ [(100 × 42.85)/(100 + 42.85)]% = 29.99% ≈ 30%

So, cost price is 30% less than marked up price.