a charitable foundation awards grants in exactly 4 ares: M,T W,Y; >=1 grants are awarded in each of the 4 quarters of a calendar year. and:
grants are awarded in all 4 areas no more than 6 grants are awarded no grants in the same area are awarded in the same quater or in consecutive quarters exactly 2 M grants are awarded a W grant is awarded in the 2nd quater
question 23: it is fully determined which grants are awarded for each quater of a particular calender year if which one of the following is true that year?
answer: E : 3 grants are awarded in the 3rd quater
my question: under this condition u still do not know whether there are 5 grants awarded that year or 6 grants, how can u be sure which grants are awarded for each quarter?
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发表于 2009-12-5 13:01:43
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