[計量] GWD30-26.31
GWD30-26
Is X<Y?
(1) The ratio of x to y is 7/9
(2) xy>0
Key: (E)
GWD30-31
There is 5 cars to displayed in 5 parking spaces with all the cars facing
the same direction. Of the 5 cars, 3 are reds, 1 is blue, and 1 is yellow,
and 1 is yellow. If the cars are identical except for color, how many
different display arrangements of the 5 cars are possible?
A. 20
B. 25
C. 40
D. 60
E. 125
Key: (A)
謝謝解題!! Tkx...
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