Mandar bought a calculator and sold it to Ketan at a profit of 5%. Ketan sold it to Tushar at a loss of 25%. If Tushar paid ₹3780, then the cost price (in ₹) of the calculator Mandar bought is
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Correct answer: A
Explanation
The correct answer is option 1 i.e. 4800.
Let Mandar's cost = P.
Mandar → Ketan at 5%:
Ketan's CP = P × 21/20
Ketan → Tushar at 25% loss:
Tushar paid = (P × 21/20) × 3/4 = P × 63 ÷ 80
P × 63 ÷ 80 = 3780
⇒ P = 3780 × 80 ÷ 63
P = 60 × 80 = 4800