![michibabiee](/avatars/15203.jpg)
michibabiee
10.03.2020 •
Mathematics
5. A box in a supply room contains 15 compact fluorescent lightbulbs, of which 5 are rated 13-watt, 6 are rated 18-watt, and 4 are rated 23-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
Solved
Show answers
More tips
- H Horoscopes, Magic, Divination How to Cast a Love Spell on a Guy? Guide for Guys...
- F Family and Home How to Sew Curtain Tapes: Best Tips from Professionals...
- S Style and Beauty How are artificial nails removed?...
- S Style and Beauty How to Make Your Lips Fuller? Ideas and Tips for Beautiful Lips...
- F Food and Cooking The Disease That Haunted Abraham Lincoln...
- C Computers and Internet How to Get Rid of Windows Genuine Check?...
- H Health and Medicine How to perform artificial respiration?...
- S Style and Beauty Tricks and Tips: How to Get Rid of Freckles...
- C Computers and Internet How Do You Refill Cartridges?...
- A Auto and Moto Battle for the Relocation of The Cherkizovsky Market: Who Won?...
Answers on questions: Mathematics
- M Mathematics Solve the equation -6x - 202= 86 + 2x...
- M Mathematics How do you write c = 12n - 100 in function notation...
- M Mathematics What is the y-intercept of the line graphed?...
- M Mathematics I ll mark the correct answer brainliest!...
- M Mathematics Will make what is the y-intercept of the line graphed?...
- M Mathematics Can someone me? this is mortgage payments lesson in trigonometry....
- M Mathematics Skew lines are lines that are not contained in the same plane and do not intersect. true or false...
- M Mathematics What is the percent of 2wrong out of 5?...
- M Mathematics I’d really appreciate ! i’m marking brainliest....
- M Mathematics How many sites are shown in this data set...
Ответ:
176/1125 or 0.156
Step-by-step explanation:
There are 15 bulbs, of which 4 are 23-watt. The probability of selecting a 23-watt bulb = 4/15. If we call this probability x, then x = 4/15.
The probability of selecting a 13-watt or 18-watt bulb is the probability of not selecting a 23-watt bulb. If we call this y, y = (6+5)/15 = 11/15. It follows that x and y are mutually exclusive. Here, we have a binomial distribution.
The number of ways of selecting exactly two 23-watt bulbs out of three is
The probability of selecting them is
Ответ: