Mathematics, 26.11.2021 23:30, eweqwoewoji

Let represent the 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 . = 0 1 *** 4 5 ( = ) * ** 0.40 0.13 0.02
Assuming that * = 2 (**) and E(X) = 12.77
(a) Find the values of ‘’, ‘’, and ‘’.
(b) Determine P(1 ≤ < 4).

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