Hello! Welcome to my show(欢迎参观我的展览). They're my animals. Look! The lion has got a blue shirt. The tiger has got a red hat. The monkey has got a yellow skirt. The panda has got a green T-shirt. Has the elephant got a brown sweater? No, he hasn't. He has got an orange sweater. That's very funny.
A. B. C. D. E.
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若1，2，3，a的平均数是3，又4，5，a，b的平均数是5，则0，1，2，3，4，a，b的方差是多少？
B. 
C. 
D. 
E. 
