For the first one, the P(X=1 or 2)=1/15+2/15=1/5 and I get that part. Is the answer 1/5 for the other two as well, because in both cases X can only be 1 and 2, or I'm wrong?
2026-04-25 03:46:09.1777088769
Let pX(x) = x/15, x = 1, 2, 3, 4, 5, zero elsewhere, be the pmf of X. Find P(X = 1 or 2), P( 1/2 < X < 5/2 ), and P(1 ≤ X ≤ 2).
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