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Naval intelligence reports that 8 enemy vessels in a fleet of 17 are carrying nuclear weapons. If 6 vessels are randomly targeted and destroyed, what is the probability that at least 5 vessels transporting nuclear weapons were destroyed? Express your answer as a fraction or a decimal number rounded to four decimal places.

User Anteo
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2 Answers

4 votes

Final answer:

To calculate the probability that at least 5 vessels transporting nuclear weapons were destroyed, we can use the concept of combinations. By finding the probability of exactly 5 vessels being destroyed and the probability of all 6 vessels being destroyed, we can add these probabilities together to get the final answer.

Step-by-step explanation:

To solve this problem, we can use the concept of combinations. The probability can be calculated by finding the probability that exactly 5 vessels transporting nuclear weapons were destroyed, and then adding the probability that all 6 vessels transporting nuclear weapons were destroyed.

To find the probability that exactly 5 vessels transporting nuclear weapons were destroyed, we can use the formula:

P(5 vessels destroyed) = C(8,5) × C(9,1) / C(17,6) = 56/816

To find the probability that all 6 vessels transporting nuclear weapons were destroyed, we can use the formula:

P(6 vessels destroyed) = C(8,6) × C(9,0) / C(17,6) = 28/816

To find the probability that at least 5 vessels transporting nuclear weapons were destroyed, we can add the two probabilities:

P(at least 5 vessels destroyed) = P(5 vessels destroyed) + P(6 vessels destroyed) = (56+28)/816 = 84/816 = 0.1029 (rounded to four decimal places).

User Venugopal
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5.7k points
1 vote

Answer: Should be about a 20.4% chance

Step-by-step explanation:

17 times 6 divided by 5

User Trixx
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