Re: [計量] 想請教兩題機經
※ 引述《walk12345 (走路)》之銘言：
: 之前跟一位同學要了一份機經來做~
: 所以忘記是多久之前的機經了~
: 題目是：
: 1) This morning Pat went to the supermarket with a red bag and a green. If he
: bought 10 carrots and 6 radishes, in how many ways could he distribute
: these vegetables so that no bag would be empty?
: (A)120 (B)75 (C)60 (D)54 (E)45
: 他給的答案是(B) 想請教一下有人可以跟我講說這題要怎麼解嗎??
紅蘿蔔的放法有 (0,10) (1,9) ... (10,0) 共 11 種
小蘿蔔的放法有 (0,6) (1,5) ... (6,0) 共 7 種
扣掉 (0,10)(0,6) 與 (11,0)(6,0) 這兩種放法 (因為不可有任一袋裡面都沒放)
11*7 - 2 = 75
: 2) Orange juice of normal strength is prepared by adding three-6 ounce cans of
: water to the concents of a 6-ounce can of orange juice concentrate. If 1
: ounce of the can of concentrate was already used for some other purpose,
: how many 6-ounce cans of water should be added to the remainder of the
: concentrate to prepare juice of normal strength?
: 給的答案是 2.5 這題也是解好久都解不出來~
: 以上這兩題希望會的人教教我!!!
: 謝謝~~~
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