Question

By selling linen cloth for 150 Rs a metre, kamal gains 25%.how much profit does he get by selling 200 m of linen cloth?

Answer 1

Given on selling 1 m cloth for Rs 155 the shopkeeper gain 25%
That for 1 m cloth gain is (25/100) x 150 = Rs 37.5
Gain for 200 m cloth = ?
Hence gain on selling 200 m cloth = Rs 37.5 x 200 = Rs 7500

Answer 2

A lot of 20 bulbs contain 4 defective once,one bulb is drawn at random from the lot. what is the probability that this bulb is defective ?