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Question
Choose the correct alternative:
The random variable X has the probability density function
`f(x) = {{:("a"x + "b", 0 < x < 1),(0, "otherwise"):}`
and E(X) = `7/12`, then a and b are respectively
Options
1 and `1/2`
`1/2` and 1
2 and 1
1 and 2
Solution
1 and `1/2`
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