In each production lot for a certain toy,

问题单项选择题

In each production lot for a certain toy, 25 percent of the toys are red and 75 percent of the toys are blue. Half the toys are size A and half are size B．If 10 out of a lot of 100 toys are red and size A, how many of the toys are blue and size B ？（）

A.15

B.25

C.30

D.35

E.40

答案

参考答案：D

解析：

由题意可知，在这100个玩具中红色的玩具有25个，蓝色的玩具有75个，根据100个玩具中10个是红色A型，可推知红色B型玩具是15个，而B型共50个，所以蓝色B型有35个。