一杯牛奶喝去40%以后,加满水搅拌,再喝去40%,这时杯中牛奶还剩(  ) A.40% B.60% C.36% D.20%

问题描述:

一杯牛奶喝去40%以后,加满水搅拌,再喝去40%,这时杯中牛奶还剩(  )
A. 40%
B. 60%
C. 36%
D. 20%

(1-40%)×(1-40%),
=60%×60%,
=36%;
故选:C.