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| 投稿者:PICCO - 投稿日時:2002年11月09日 00時07分09秒 |
苦手な数学がまだわかりません。どなたか以下の問題について、解法を伝授いただけたらお願いします。３題あって２つPS,一つがDSです。
1.Three stacks containing equal numbers of chips are to be made from 9 red chips, 7 blue chips, and 5 green chips. If all of these chips are used and each stack contains at least 1 chip of each color, what is the maximum number of red chips in any one stack?
Answer：５
2. Bowl X and bowl Y each contained exactly 2 jelly beans, each of which was either red or black. One of the jelly beans in bowl X was exchanged with one of the jelly beans in bowl Y. After the exchange, were both of the jelly beans in bowl X black?
(1)Before the exchange, bowl X contained 2 black jelly beans.
(2)After the exchange, bowl Y contained 1 jelly bean of each other.
Answer:E
3.Each of the integers from 0 to 9, inclusive, is written on a seperate slip of blank paper and the ten slips are dropped into a hat. If the slips are then drawn one at a time without replacement, how many must be drawn to ensure that the numbers on two of the slips drawn will have a sum of 10?
Answer:7
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