a A box in a certain supply room contains seven 40-watt light bulbs, five 60-watt bulbs,...

a A box in a certain supply room contains seven 40-watt light bulbs, five 60-watt bulbs, and six 75-watt bulbs. Suppose that three bulbs are randomly selected. a. What is the probability that exactly two of the selected bulbs are rated 75-watt? 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. What is the probability that at least two of the selected bulbs are rated 75-watt?

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orchestra answered 2 years ago

A box in a certain supply room contains five 40-W lightbulbs, seven 60-W bulbs, and six...

A box in a certain supply room contains five 40-W lightbulbs, seven 60-W bulbs, and six 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...

A box in a certain supply room contains four 40-W lightbulbs, five 60-W bulbs, and seven...

A box in a certain supply room contains four 40-W lightbulbs, five 60-W bulbs, and seven 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...

A box contains six 25-watt light bulbs, nine 60-watt light bulbs, and five 100-watt light bulbs....

A box contains six 25-watt light bulbs, nine 60-watt light bulbs, and five 100-watt light bulbs. What is the probability a randomly selected a 60 watt light bulb? (PLease explain how did you get your answer)(2 pt) Note: You must provide your answer as a fraction NOT decimal) Cell Phone Provider Probability AT&T 0.271 Sprint 0.236 T–Mobile 0.111 Verizon 0.263 Does the above table represent the probability model? Explain your answer. (2 pt) The data shows the distance that employees...

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A box in a certain supply room contains five 40-W lightbulbs, six 60-W bulbs, and four 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...

A box contains three 40 Watt bulbs, eight 60 Watt bulbs, and nine 100 Watt bulbs....

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A box in a certain supply room contains four 30W lightbulbs, five 60W lightbulbs, and six...

A box in a certain supply room contains four 30W lightbulbs, five 60W lightbulbs, and six 70W lightbulbs. Suppose that four lightbulbs are randomly selected. 1) What is the probability that at least one lightbulb of each type is selected? 2)Find the expected number of lightbulbs (incorrect ones) that need to be selected before a 60W or 70W lightbulb is selected. Show this by building a probability table.

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A box contains 100 Christmas light bulbs -- 40 green, 35 red and 25 blue. You randomly select two bulbs from the box with replacement. The outcome of interest is the colour of each of the two selected light bulbs. (a) List the complete sample space of outcomes. (1 mark) (b) What is the probability that the two selected bulbs are the same colour? (1 mark) (c) What is the probability that the first selected bulb is green or that...

TKK Products manufactures 50-, 60-, 75-, and 100-watt electric light bulbs. Laboratory tests show that the...

TKK Products manufactures 50-, 60-, 75-, and 100-watt electric light bulbs. Laboratory tests show that the lives of these light bulbs are normally distributed with a mean of 650 hr and standard deviation of 100 hr. What is the probability that a TKK light bulb selected at random will burn for the following times? (Round your answers to four decimal places.) (a) more than 850 hr (b) less than 500 hr (c) between 650 and 850 hr (d) between 500...

5. A shipment of 50 light bulbs contains 10 defective light bulbs. In order to test...

5. A shipment of 50 light bulbs contains 10 defective light bulbs. In order to test the quality of the shipment, a quality control engineer selects 5 light bulbs at random. (a) How many different samples are possible? (b) What is the probability the engineer will select exactly two defective light bulbs? (c) The shipment will be rejected if at least one of the light bulbs in the sample is defective. What is the probability the sample will be rejected?...

A box in a supply room contains 19 compact fluorescent lightbulbs, of which 7 are rated...

A box in a supply room contains 19 compact fluorescent lightbulbs, of which 7 are rated 13-watt, 8 are rated 18-watt, and 4 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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