Correct Answer - Option 3 : 16

Given:

Profit = 25%

C.P of 20 articles is equal to the S.P of x articles

Where, C.P = Cost price, S.P = Selling price

Formula used:

Profit% = [(S.P – C.P)/ C.P] × 100

Calculation:

C.P × 20 = S.P × x

S.P/C.P = 20/x

Profit % = [(20 – x)/x] × 100

⇒ 2000 – 100x = 25x

⇒ 125x = 2000

∴ The value of ‘x’ is 16.