X has probability distribution as shown in the table x 1 2 3 4 5 1 3

Question:

X has probability distribution as shown in the table x 1 2 3 4 5 1 3 1 1 P(X-x) a 10 10 S 20

(a) Find the value of

a.

(b) Find P(X>4).

(c) Find P(X <1).

(d) Find P(2X <4).

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