Answer: (1) 3/4 (2) 1/4
S = {HH, HT, TH, TT}, n(S) = 4
(1) A = {HH, HT, TH}, n(A) = 3, so \( P(A) = \frac{3}{4} \).
(2) B = {TT}, n(B) = 1, so \( P(B) = \frac{1}{4} \).
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· 24 Oct 2026
AI-verified · Oct 2026
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