Find the mean of the probability distribution of a random variable X which if 𝑃(𝑋) =
𝑥+1
20
for X= 1, 2, 3, 4, and 5.
"EX=\\sum_{x=1}^5{x\\cdot \\frac{x+1}{20}}=\\frac{1}{20}\\left( 1\\cdot 2+2\\cdot 3+3\\cdot 4+4\\cdot 5+5\\cdot 6 \\right) =3.5"
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