![QuestionsAnsweredNow](/avatars/19559.jpg)
QuestionsAnsweredNow
20.02.2020 •
Mathematics
A bag contain 80 balls numbered 1,...,80. before the game starts, you choose 10 different numbers from among 1,..80 and write them on piece of paper. then 20 balls are selected with out replacement out of the bag at random.
a. What is the probability that all your numbers are selected?
b. What is the probability that none of your numbers is selected?
c. What is the probability that exactly 4 of your numbers are selected?
Solved
Show answers
More tips
- L Leisure and Entertainment How to Properly Wind Fishing Line onto a Reel?...
- L Leisure and Entertainment How to Make a Paper Boat in Simple Steps...
- T Travel and tourism Maldives Adventures: What is the Best Season to Visit the Luxurious Beaches?...
- H Health and Medicine Kinesiology: What is it and How Does it Work?...
- O Other How to Choose the Best Answer to Your Question on The Grand Question ?...
- L Leisure and Entertainment History of International Women s Day: When Did the Celebration of March 8th Begin?...
- S Style and Beauty Intimate Haircut: The Reasons, Popularity, and Risks...
- A Art and Culture When Will Eurovision 2011 Take Place?...
- S Style and Beauty How to Choose the Perfect Hair Straightener?...
- F Family and Home Why Having Pets at Home is Good for Your Health...
Answers on questions: Mathematics
- M Mathematics What are the coordinates of point A? 115 4 3 2 1 X -5 -4 -3 -2 -1 2 3 4 5 . A -2 -3 -4 -5 1-3.2) 1-3-2) 1-2-3) (-2,3)...
- M Mathematics The category of inferential statistics that focuses on determining when the null hypothesis should be rejected is calledconfidence intervalshypothesis significance testingthe new...
- M Mathematics Solve for h sa = 2pir^2 + 2pirh...
- M Mathematics My neighbor has two cats and both cats have yellow eyes. Therefore when two cats live together, they will both have yellow eyes. The given conclusion uses inductive reasoning because...
- C Chemistry Which is a characteristic of mixtures?...
- P Physics 4. What is the opposite reaction pair to gravity?...
- M Mathematics Find the quotient of 12/5÷ 2/5. 1. Rewite the division as multiplication by the reciprocal.The rewritten expression is 2. Multiply the numerators to get , and then multiply the...
- H History In what ways could the Munich Pact have affected future alliances made during World War ?...
- B Business What would help a company reduce the risk of developing products for which there is little or no demand...
Ответ:
a. 0.24094
b. 0.2494
c. 0.1473
Step-by-step explanation:
The total probability of choosing any 20 random balls out of 80 is
. We use combination since the order of selection does not matter
a. P(all numbers are selected)
b. P(none of them are selected)
Since none of our numbers are selected, we assume that all the numbers selected are from the other 70.
c. P (exactly four are selected)
Only four from our numbers are selected and the rest 16 from the other 70 numbers.
Ответ:
(6)2 + 3 + 6
12 + 3 + 6
21
Thank you and please rate me as brainliest as it will help me to level up