L&T Company Numerical Ability Profit and Loss

The difference between a discount of 40% on Rs. 500 and two successive discounts of 36% and 4% on the same amount is:
(a) 0
(b) Rs. 2
(c) Rs. 1.93
(d) Rs. 7.20
(e) None of these

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L&T Other Question

A discount series of 10%, 20% and 40% is equivalent to a single discount of:
(a) 50%
(b) 56.8%
(c) 60%
(d) 70.28%
(e) None of these
On an article with marked price Rs. 20000, a customer has a choice between three successive discounts of 20%, 20% and 10% and three successive discounts of 40%, 5% and 5%. By choosing the better offer, he can save:
(a) nothing
(b) Rs. 690
(c) Rs. 715
(d) Rs. 785
(e) None of these