Probability Density Function

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A probability density function is of the form $p(x) = K e^{-\alpha |x|}$, where x belongs to $(-\infty, \infty)$. The value of K is
 (a) 0.5
 (b) 1
(c) 0.5 \alpha 
 d) \alpha
Answer is (c)

Concept

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