If the selling price is doubled, the profit triples. Find the profit %:

100%

Assume Selling Price be S

Cost Price = C

Profit = P = S-C

New Doubled Selling Price S' = 2S

New Tripled Profit P' = 3P

P% = 3P*100/C = 3(S-C)*100/C ..... (1)

Also P% = (2S-C)*100/C ....(2)

Equating 1and 2, 3(S-C)*100/C = (2S-C)*100/C

3S - 3C = 2S - C

S = 2C

P = (S-C) = (2C-C) = C

P% = C*100/C = 100%

The correct answer is Option (4) → 100%