a man bought an article for Rs. 192 at successive discount of 20% and X%.find the value of X, if the marked price of the article is Rs.400.
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Solution :-
→ Marked price (MP) of article = Rs.400
→ Discount 1 = 20%
so,
→ SP after first discount = MP * (100 - discount %)/100 = (400 * 80)/100 = Rs.320
now,
→ SP after first discount = Rs.320
→ Discount 2 = X %
then,
→ SP after second discount = Rs. [320 * (100 - X)]/100
A/q,
→ [320 * (100 - X)]/100 = 192
→ 320 * (100 - X) = 19200
→ 100 - X = 60
→ X = 100 - 60
→ X = 40 % (Ans.)
Hence, value of X is equal to 40 % .
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