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BrownianMan
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I'm unsure about these Qs, but I attempted it & posted my answers. If any could verify if I'm on the right track, i'd appreciate it!
A company has just placed an order with a supplier for two different products. Let A1 be the event that the first product is out of stock and let A2 be the event that the second product is out of stock. Suppose that P(A1) = 0.3, P(A2) = 0.2, and the probability that at least one product is out of stock is 0.4.
(a) What is the probability that both products are out of stock?
(b) Are A1 and A2 independent events? Explain.
(c) Given that the first product is in stock, what is the probability that
the second is also?
My answers
(a) (0.3)(0.2) = 0.06
(b) Yes, they are independent
(c) P(A2 | A1) = P(A2) = 0.2
A construction firm has bid on two different contracts. Let A1 be the event that the bid on the first contract is successful, and define A2 analogously for the second contract. Suppose that P(A1) = 0.4, P(A2) = 0.3, and that A1 and A2 are independent events.
(a) Calculate the probability that both bids are successful.
(b) Calculate the probability that neither bid is successful.
(c) What is the probability that the firm is successful in at least one of the
two bids?
My answers:
(a) (0.4)(0.3) = 0.12
(b) (1-0.4)(1-0.3) = 0.42
(c) 0.4+0.3-0.12 = 0.58
A company has just placed an order with a supplier for two different products. Let A1 be the event that the first product is out of stock and let A2 be the event that the second product is out of stock. Suppose that P(A1) = 0.3, P(A2) = 0.2, and the probability that at least one product is out of stock is 0.4.
(a) What is the probability that both products are out of stock?
(b) Are A1 and A2 independent events? Explain.
(c) Given that the first product is in stock, what is the probability that
the second is also?
My answers
(a) (0.3)(0.2) = 0.06
(b) Yes, they are independent
(c) P(A2 | A1) = P(A2) = 0.2
A construction firm has bid on two different contracts. Let A1 be the event that the bid on the first contract is successful, and define A2 analogously for the second contract. Suppose that P(A1) = 0.4, P(A2) = 0.3, and that A1 and A2 are independent events.
(a) Calculate the probability that both bids are successful.
(b) Calculate the probability that neither bid is successful.
(c) What is the probability that the firm is successful in at least one of the
two bids?
My answers:
(a) (0.4)(0.3) = 0.12
(b) (1-0.4)(1-0.3) = 0.42
(c) 0.4+0.3-0.12 = 0.58