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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