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Question 1.Fort his series of observations, find the mean, median, mode, range, variance and standard deviation.500, 600, 800, 800, 900, 900, 900, 900, 900, 1000, 1100Question 2.A box contains 7 red, 5 white and 4 black balls. What is the probability of drawing:a) 1 red ballb) 1 black ballc) 1 red or... 顯示更多 Question 1. Fort his series of observations, find the mean, median, mode, range, variance and standard deviation. 500, 600, 800, 800, 900, 900, 900, 900, 900, 1000, 1100 Question 2. A box contains 7 red, 5 white and 4 black balls. What is the probability of drawing: a) 1 red ball b) 1 black ball c) 1 red or white ball Question 3. Find the probability that drawing a heart on a single draw from a deck of 52 cards and total of 7 on a single roll of a pair of dice? Question 4 What is the probability that drawing a 7 or a heart card from a standard 52 cards deck? Question 5 We have 6 machines are in operation. The probability that at the end of one day, a machine is still in operation is 0.6. If the machines function independently, find the most probable number of machines in operation at the end of that day and the probability that these many machines are operating. Question 6 What is the probability of getting exactly 4 “6” when a die is rolled 7 times? Question 7 If the probability of hitting a target on a single shot is 0.8, what is the probability that in four shots, we hit the target at least twice? Question 8 Records of an insurance company show that every 1000 accidents has 3 accidents involve a fatality. a) What is the probability that no fatality is involved in 30 accidents? b) What is the probability that 4 fatalities is involved in 20 accidents?
最佳解答:
I have answered Q. 1, 2, 4, 5, 6 and 7 previously. Please refer to: http://hk.knowledge.yahoo.com/question/question?qid=7008050901925 3. P(heart) = 13/52 = 1/4 P(total 7) = 6/36 = 1/6 Required probability = P(heart) X P(total 7) = 1/4 X 1/6 = 1/24 圖片參考：http://i182.photobucket.com/albums/x4/A_Hepburn_1990/A_Hepburn01May181116.jpg?t=1211080611
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Question 1.Fort his series of observations, find the mean, median, mode, range, variance and standard deviation.500, 600, 800, 800, 900, 900, 900, 900, 900, 1000, 1100Question 2.A box contains 7 red, 5 white and 4 black balls. What is the probability of drawing:a) 1 red ballb) 1 black ballc) 1 red or... 顯示更多 Question 1. Fort his series of observations, find the mean, median, mode, range, variance and standard deviation. 500, 600, 800, 800, 900, 900, 900, 900, 900, 1000, 1100 Question 2. A box contains 7 red, 5 white and 4 black balls. What is the probability of drawing: a) 1 red ball b) 1 black ball c) 1 red or white ball Question 3. Find the probability that drawing a heart on a single draw from a deck of 52 cards and total of 7 on a single roll of a pair of dice? Question 4 What is the probability that drawing a 7 or a heart card from a standard 52 cards deck? Question 5 We have 6 machines are in operation. The probability that at the end of one day, a machine is still in operation is 0.6. If the machines function independently, find the most probable number of machines in operation at the end of that day and the probability that these many machines are operating. Question 6 What is the probability of getting exactly 4 “6” when a die is rolled 7 times? Question 7 If the probability of hitting a target on a single shot is 0.8, what is the probability that in four shots, we hit the target at least twice? Question 8 Records of an insurance company show that every 1000 accidents has 3 accidents involve a fatality. a) What is the probability that no fatality is involved in 30 accidents? b) What is the probability that 4 fatalities is involved in 20 accidents?
最佳解答:
I have answered Q. 1, 2, 4, 5, 6 and 7 previously. Please refer to: http://hk.knowledge.yahoo.com/question/question?qid=7008050901925 3. P(heart) = 13/52 = 1/4 P(total 7) = 6/36 = 1/6 Required probability = P(heart) X P(total 7) = 1/4 X 1/6 = 1/24 圖片參考：http://i182.photobucket.com/albums/x4/A_Hepburn_1990/A_Hepburn01May181116.jpg?t=1211080611
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