Traditional Culture Encyclopedia - Photography major - A shopping mall designed a lottery model for promotion. A certain amount of money can get a lottery ticket, and each lottery ticket can be packed in a container of the same size.
A shopping mall designed a lottery model for promotion. A certain amount of money can get a lottery ticket, and each lottery ticket can be packed in a container of the same size.
The probability distribution list of (1) (2)X is as follows
X
10
20
P
0.04
0.32
0.64
(1) Let "winning the lottery at one time" be event A, then P (a) = =.
Answer: The probability of winning the lottery is.
(2)X can be 0,10,20,
P(X=0)=(0.2) 2 =0.04,P(X= 10)= ×0.8×0.2=0.32,P(X=20)=(0.8) 2 =0.64。
The probability distribution list of x is
X
10
20
P
0.04
0.32
0.64
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