Question 2A box contains 17 lightbulbs, of which 6 are rated 13-watt, 5 are rated 18-watt, and 6 are rated23-watt. Suppose that three of these bulbs are randomly selected.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 of each type is selected?

Given data 17 light bulbs=6(13 watt)+5(18 watt)+6(23 Watt) Farmula used: nCr=n!/(r!(n-r)!)…

Answered: Question 2 A box contains 17…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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1. A city has 9 coffee shops: 3 Starbuck's, 2 Caribou Coffees, and 4 Crazy Mocho Coffees. If a person selects one shop at random to buy a cup of coffee, find the probability that it is either a Starbuck's or Crazy Mocho Coffees.
Example 7: If 3 balls are distributed to 4 cells, numbered as 1, 2, 3, 4. Find the probability that each cell numbered 1, 2, 3 will contain exactly one ball.
Solve the following: 1.) In a mathematics seminar, 15 students are in grade 7, 10 are in grade 8, 20 are in grade 9 ans 30 are in grade 10. If a student will be chosen at random,what is the probability of selecting a grade 10 student? 2.) From a basket with 10 apples, 8 oranges , and 7 mangoes, a fruit will be selected. What is the probability of selecting an orange? 3.) abigail placed 50 strips of paper numbered from 1 to 50 inside a fishbowl. If she picked a strip of paper at random, what was the probability of getting a strip of paper numbered from 25 to 40? 4.) In tossing three coin, what is the probability of obtaining least one head? 5.)The probability that anna will be invited by her friends to a dance party is .8. What is the probability that she will not be invited?
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6.) The National Spinal Cord Injury Statistical Center reports that 45% of all spinal cord injuries are caused by vehicle crashes. Suppose that we choose 15 spinal cord injuries at random.a.) What is the probability that 8 of the chosen injuries are from vehicle crashes? (Usethe formula)b.) What is the probability that fewer than 5 of the chosen injuries are from vehiclecrashes? (Use the calculator)c.) What is the probability that more than 9 of the chosen injuries are from vehiclecrashes? (Use the calculator)d.) What is the probability that between 4 and 10 of the chosen injuries are from vehiclecrashes? (Use the calculator)e.) What is the expected number of such injuries to result from vehicle crashes?f.) What is the standard deviation of the number of injuries resulting from vehiclecrashes?
a). A girl is randomly picking flowers in a meadow for a bouquet. She will stop once she has picked 4 dandelions. Suppose that a randomly selected flower is a dandelion with probability 0.70. Find the probability that her bouquet will have exactly 8 flowers in total. b). An entomologist has a collection of 20 insect specimens: 5 are butterflies and 15 are moths. He randomly selects a sample of 6 specimens to study. Find the probability that the sample contains an equal number of butterflies and moths. 2
A college surveys the 1258 alumni from 2019 and 2020. Of the 679 alumni from 2019, 127 went on to graduate school. Of the 579 alumni from 2020, 196 went on to graduate school. Find the probability that an alumnus selected at random from 2019 and 2020 is as described. a) a 2019 alumnus? b) a 2020 alumnus? c) a 2019 alumnus who did not attend graduate school?
Use the following information to answer Question 16 and Question 17. A bag has 4 yellow balls and 6 red balls only. One ball is chosen at random and not replaced. A second ball is then chosen at random. Find the probability that both balls are yellow. A. 2/15 В. 4/25 C. 2/5 D. 11/15 Question 17 Find the probability that both balls have the same colour. А. 2/15 В. 1/6 С. 3/10 Activate D. 7/15 Go to Set
a. An urn contains 3 red, 4 white and 5 blue discs. Two discs are selected at random from the urn, one by one without replacement. Find the probability that both discs are different colors.
Please help me fix problem D,E,F, Thank you!
Five people, designated as A,AB,C,D,E are arranged in linear order. Assuming that each possible order is equally likely, what is the probability that there are exactly two people between A and B?
A circuit has three independent switches A, B , C wired inparallel. current can only flow through the bank of switches if at least one of them is closed. The probability that any given switch is closed is 0.9. calculate the probability that the current can flow throught the bank of switches.

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