a carton of 12 lightbulbs includes 3 that are defective. If 2 bulbs are chosen at...
a carton of 12 lightbulbs includes 3 that are defective. If 2 bulbs are chosen at random, what are the probabilities that a) neither bulb will be defective b) exactly 1 bulb will be defective c) both bulbs will be defective?
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a carton of 12 lightbulbs includes 3 that are defective. If 2
bulbs are chosen at...
1. A lightbulb factory produces 567 lightbulbs every hour. Approximately 1.96% of the lightbulbs are defective,...
1. A lightbulb factory produces 567 lightbulbs every hour. Approximately 1.96% of the lightbulbs are defective, and do not work. What is the expected number of defective bulbs produced in an hour? The answer does not need to be an integer. 2. A lightbulb factory produces 956 lightbulbs every hour. Approximately 2.91% of the lightbulbs are defective, and do not work. What is the standard deviation of the number of defective bulbs produced in an hour? 3.A call center receives...
please answer fast and neat 2. (30 pts) A box contains 3 defective and 4 working...
please answer fast and neat
2. (30 pts) A box contains 3 defective and 4 working bulbs. You choose 3 times 2 bulbs at random from the box without replacement. What is the probability that one defective and one working bulb are chosen each time?
A box in a certain supply room contains four 40-W lightbulbs, three 60-W bulbs, and five...
A box in a certain supply room contains four 40-W lightbulbs, three 60-W bulbs, and five 75-W bulbs. Suppose that three bulbs are randomly selected. (Round your answers to four decimal places.) (a) What is the probability that exactly two of the selected bulbs are rated 75-W? (b) What is the probability that all three of the selected bulbs have the same rating? (c) What is the probability that one bulb of each type is selected? (d) Suppose now that...
Approximately 20% of the lightbulbs produced by a company are defective (and the rest are non-defective)....
Approximately 20% of the lightbulbs produced by a company are defective (and the rest are non-defective). Suppose 3 lightbulbs are selected randomly. Let Y be the random variable showing number of defective lightbulbs. a)Complete the following probability distribution given in the following table. (You can use binomial distribution formula) y p(y) 0 0.512 1 2 3 0.008 Find the mean and variance of the above probability distribution
The table lists the number of defective 60-watt lightbulbs found in samples of 100 bulbs selected...
The table lists the number of defective 60-watt lightbulbs found in samples of 100 bulbs selected over 25 days from a manufacturing process. Assume that during this time the manufacturing process was not producing an excessively large fraction of defectives. Day 1 2 3 4 5 6 7 8 9 10 Defectives 5 3 6 9 3 4 4 6 6 2 Day 11 12 13 14 15 16 17 18 19 20 Defectives 3 4 3 4 1 3...
A box in a certain supply room contains three 40-W lightbulbs, seven 60-W bulbs, and five...
A box in a certain supply room contains three 40-W lightbulbs, seven 60-W bulbs, and five 75-W bulbs. Suppose that three bulbs are randomly selected. (Round your answers to four decimal places.) (a) What is the probability that exactly two of the selected bulbs are rated 75-w2 079 (b) What is the probability that all three of the selected bulbs have the same rating? (c) What is the probability that one blb of each type is selected? d) Suppose now...
A box of 8 flashbulbs contains 3 defective bulbs. A random sample of 2 is selected...
A box of 8 flashbulbs contains 3 defective bulbs. A random sample of 2 is selected and tested. Let X be the random variable associated with the number of defective bulbs in a sample. (A) Find the probability distribution of X. (B) Find the expected number of defective bulbs in a sample.
b. What is the probability that exactly one of the LED light bulbs is defective? c....
b. What is the probability that exactly one of
the LED light bulbs is defective?
c. What is the probability that three or fewer of the LED light
bulbs are defective?
d. What is the probability that six or more of the LED light
bulbs are defective?
A manufacturing company regularly conducts quality control checks at speafied periods on the products it manufactures. Historically, the failure rate for LED ight bulbs that the company manufactures is 17%. Suppose a random...
A bag of 31 tulip bulbs contains 10 red tulip? bulbs, 12 yellow tulip? bulbs, and...
A bag of 31 tulip bulbs contains 10 red tulip? bulbs, 12 yellow tulip? bulbs, and 9 purple tulip bulbs. ?(a) What is the probability that two randomly selected tulip bulbs are both? red? ?(b) What is the probability that the first bulb selected is red and the second? yellow? ?(c) What is the probability that the first bulb selected is yellow and the second? red? ?(d) What is the probability that one bulb is red and the other? yellow?
A box in a supply room contains 20 compact fluorescent lightbulbs, of which 6 are rated...
A box in a supply room contains 20 compact fluorescent lightbulbs, of which 6 are rated 13-watt, 9 are rated 18-watt, and 5 are rated 23-watt. Suppose that three of these bulbs are randomly selected. (Round your answers to three decimal places.) (a) What is the probability that exactly two of the selected bulbs are rated 23-watt? (b) What is the probability that all three of the bulbs have the same rating? (c) What is the probability that one bulb...
please answer fast and neat
2. (30 pts) A box contains 3 defective and 4 working bulbs. You choose 3 times 2 bulbs at random from the box without replacement. What is the probability that one defective and one working bulb are chosen each time?
A box in a certain supply room contains three 40-W lightbulbs, seven 60-W bulbs, and five 75-W bulbs. Suppose that three bulbs are randomly selected. (Round your answers to four decimal places.) (a) What is the probability that exactly two of the selected bulbs are rated 75-w2 079 (b) What is the probability that all three of the selected bulbs have the same rating? (c) What is the probability that one blb of each type is selected? d) Suppose now...
b. What is the probability that exactly one of
the LED light bulbs is defective?
c. What is the probability that three or fewer of the LED light
bulbs are defective?
d. What is the probability that six or more of the LED light
bulbs are defective?
A manufacturing company regularly conducts quality control checks at speafied periods on the products it manufactures. Historically, the failure rate for LED ight bulbs that the company manufactures is 17%. Suppose a random...
A box in a supply room contains 20 compact fluorescent lightbulbs, of which 6 are rated 13-watt, 9 are rated 18-watt, and 5 are rated 23-watt. Suppose that three of these bulbs are randomly selected. (Round your answers to three decimal places.) (a) What is the probability that exactly two of the selected bulbs are rated 23-watt? (b) What is the probability that all three of the bulbs have the same rating? (c) What is the probability that one bulb...
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