[計量] 請問幾題
The table above shows a certain store's bicycle inventory where
a,b,c,and d represent the number of bicycles in each category.If
there are 1/2 as many red bicycles as blue bicylces in the store
and twice as many 3-speed red bicycles as 10-speed red bicycles,
what fraction of the number of bicycles in the inventory are 10-
speed red bicycles?
(A)1/9 (B)1/6 (C)2/9 (D)1/4 (E)1/3
┌────┬────┬────┐
│ │ │ │
│ bicycle│ 3-speed│10-speed│
├────┼────┼────┤
│ red │ a │ b │
├────┼────┼────┤
│ blue │ c │ d │
└────┴────┴────┘ (答案給A可是我覺得是4/9)
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Column A Column B
The fraction of a The fraction of a
minute represented day represented by
by 45 secondsn 16 hours
(答案給A可是我覺得是B)
我左邊算8/6 右邊算9/6
是我誤解題目的意思嗎???@@
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以上兩題感謝大家了>"<
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