Exponential Distribution Probability
Given "\\beta=200, \\lambda=\\dfrac{1}{\\beta}=\\dfrac{1}{200}"
i) less than 200 months
"=1-e^{-1}\\approx0.63212"
ii) between 100 months to 25 years.
"=1-e^{-{1 \\over 200}( 3000)} -(1-e^{-{1 \\over 200}( 100)} )="
"=e^{-{1 \\over 2}}-e^{-15}\\approx0.60653066-0.00000031\\approx0.60653"
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