Question
Mansi wanted to purchase 36 speakers whose cost was Rs.
600 each. The trader offered her a discount if she were to purchase a set of 40 speakers. So she calculated that if she assume the normal price of 36 speakers then she can purchase 4 extra speakers which cost her only Rs. 210 each of four speakers at the cost price of 36 speakers after discount. What is the percentage discount?Solution
Price of 36 speakers = 36 x 600 = 21600 Price of 40 speakers (without discount)= 40 x 600 = 24000 Price of 40 speakers (with discount) = 36 x 600 + 4 x 210 = 21600 + 840 = 22440 Therefore discount = 24000 – 22440 = 1560 Hence discount % = (1560/ 24000) x 100 = 6.5%
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