37. 3184-!-item-!-187;#058&003224
When 1,000 children were inoculated with a certain vaccine, some developed inflammation at the site of the inoculation and some developed fever. How many of the children developed inflammation but not fever?
(1) 880 children developed neither inflammation nor fever.
(2) 20 children developed fever.
ANS: C
答案為C
我在C與E之間遊走
我覺的E也對的原因是:(1)+(2)合起來考慮之下沒有inflamation 也沒 fever有880人,那有病的就有120人。有20人是fever,那剩下的100人,單純來想就是有inflammation。
我的問題在於,那100人當中,難到就不會有人同時感染inflammation and fever 嗎? 這是為什麼我覺的E 也可以的原因。
有人可以幫助我解惑嗎? 可能是我少考慮了什麼了。謝謝