In a pay-as-}rou go cellpl1one plan, t he cost of sending
Chapter 3, Problem 3.5(choose chapter or problem)
In a pay-as-}rou go cellpl1one plan, t he cost of sending an Sl\IIS t ext rr1essage is 10 cer1ts and t he cost of r eceiving a text is 5 cents. For a certain Sl1bscriber, the probability of ser1ding a text is 1/3 and t11e probability of receivir1g a text is 2/3. Let C eqllal t11e cost (ir1 cents) of one text rr1essage and find (a) The P11!F Pc(c) (b) T11e expect ed vall1e E[C] ( c) The probability t hat the subscriber ( d) The expected number of texts rereceives four texts before sending ceived by the subscriber before a text. t11e subscriber ser1ds a text.
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