Let ?representthe number of typographical errors made per page typed by a receptionist during a particular day at the office. The following table lists the probability distribution of ?.?=?01***45?(?=?)***0.400.130.02 Assuming that * = 2 (**) and E(X) = 12.77 a)Find the valuesof ‘*’, ‘**’, and ‘***’. (b)Determine P(1≤?<4).

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Chapter1: Combinatorial Analysis
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Let ?representthe number of typographical errors made per page typed by a receptionist during a particular day at the office. The following table lists the probability distribution of ?.?=?01***45?(?=?)***0.400.130.02

Assuming that * = 2 (**) and E(X) = 12.77

a)Find the valuesof ‘*’, ‘**’, and ‘***’.

(b)Determine P(1≤?<4).

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