[問題]GAMT Prep pp 01-30

[tandy]

我想問的是新pp裡的題目
Of the 60 animals on a certain farm, 2\3 are either pigs or cows, How many of the animals are cows?
(1)the farm has more than twice as many cows as it has pigs
(2)the farm has more than 12 pigs
Ans:C
我想請問為什麼答案不是A呢?又該如何解?謝謝~~

[吳]

Of the 60 animals on a certain farm, 2\3 are either pigs or cows, How many of the animals are cows?
(1)the farm has more than twice as many cows as it has pigs
(2)the farm has more than 12 pigs
Ans:C

(1)牛是豬兩倍多....多多少?=>不能算

題目+(1)+(2)
p+c=40
c>2p
p>12
p=13=>c=27符合1.2
p=14=>c=26不合1
所以c=27

[tandy]

瞭解了!THANKS