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be a binomial random variable with E?X:-7 and Find (a) The parianeters N aud p. ) Px-4, PX Busow arrive ist a 8pe(ified Mop at ?5-tuntute intervals starting 7 AM Tht Ver(X)-21 they arrive at 7,7:15, 7:30, 7:45 , and so ou f s pnge stop ad. u time that is unifornnly distribnted between 7 and 7 30 Sad probability that he waits (a) less than 5 miutes for a bs. (b at least 10 minstes for a b 10 The power W dissipated in aresistor is propurtional to the sguare of the wg V. That is - V2 where r is a constant. If r-3 and V Uan br asumed to be a normal random variable with mcan 6 and standard deviation 1, find (a) Ew (b) P(W 120
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