Mathematics, 15.04.2020 00:34, kaelep
Let X and Y be discrete random variables. Let E[X] and var[X] be the expected value and variance, respectively, of a random variable X. (a) Show that E[X + Y ] = E[X] + E[Y ]. (b) If X and Y are independent, show that var[X + Y ] = var[X] + var[Y ].
Answers: 3
Mathematics, 21.06.2019 14:30, brockandersin
Bismuth-210 is an isotope that radioactively decays by about 13% each day, meaning 13% of the remaining bismuth-210 transforms into another atom (polonium-210 in this case) each day. if you begin with 233 mg of bismuth-210, how much remains after 8 days?
Answers: 3
Mathematics, 21.06.2019 19:30, Lindsay882
How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way
Answers: 1
Let X and Y be discrete random variables. Let E[X] and var[X] be the expected value and variance, re...
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