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finlep [7]
3 years ago
11

Select the correct answer. x Probability 0 0.2 1 0.1 2 0.4 3 0.2 4 0.1 The probability distribution of x, a discrete random vari

able, is given in the table. What is the expected value of x? A. 0.8 B. 1.9 C. 2 D. 5
Mathematics
1 answer:
Alex_Xolod [135]3 years ago
7 0

Answer: The option B. 1.9 is correct

Explanation:

We are given the below information:

x               Probability P(x)

0                      0.2

1                       0.1

2                      0.4

3                       0.2

4                       0.1

The expected value of x is given below:

E(x)=\sum x P(x)

         =(0 \times 0.2)+(1 \times 0.1)+(2 \times 0.4)+(3 \times 0.2)+(4 \times 0.1)

        =0+0.1+0.8+0.6+0.4

        =1.9

Therefore, the expected value of x is 1.9      



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