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junior college 2 | H2 Maths
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help pls ty!!!
Date Posted: 1 week ago
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X ~ B(5, 0.35)
(a) P(X <= 2) = P(X = 0) + P(X = 1) + P(X = 2) = (1 - 0.35)^5 + 5C1 (0.35)(1 - 0.35)^4 + 5C1 (0.35)^2(1 - 0.35)^3
(b)(i) Probability = (1 - answer from (a))^3
(b)(ii) Probability = P(X = 1) x P(X = 2) x (1 - answer from (a)) x 3!
(c) Probability = 10C7 P(X = 1) x (1 - P(X = 1))
(a) P(X <= 2) = P(X = 0) + P(X = 1) + P(X = 2) = (1 - 0.35)^5 + 5C1 (0.35)(1 - 0.35)^4 + 5C1 (0.35)^2(1 - 0.35)^3
(b)(i) Probability = (1 - answer from (a))^3
(b)(ii) Probability = P(X = 1) x P(X = 2) x (1 - answer from (a)) x 3!
(c) Probability = 10C7 P(X = 1) x (1 - P(X = 1))
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