求问一道prep数学~

378592285 · 发表于 2015-6-19 13:48:10

Henry purchased 3 items during a sale.  He received a 20 percent discount off the regular price of the most expensive item and a 10 percent discount off the regular price of each of the other 2 items.  Was the total amount of the 3 discounts greater than 15 percent of the sum of the regular prices of the 3 items?

(1)  The regular price of the most expensive item was $50, and the regular price of the next most expensive item was $20.

(2)  The regular price of the least expensive item was $15.

搜到以前有人问过的这题解答，但还是不懂啊，数学渣。。。。求大神~~

求问一道prep数学~

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