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There are 40 integer numbers from 1 to 40, inclusive.
It is your sample set in your experiment.
You can choose any of these 40 numbers equally likelihood.
Of them, there are 10 integers that are multiple of 4.
It is yours "favorable" set.
The probability is the ratio of the number of "favorable" events to the total numbers of events.
In this case, the probability
P = = = = 0.25 = 25%. ANSWER
This problem is good to explain the basic conceptions of the Probability theory and
to pronounce/(to teach and to learn) the corresponding key words.
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For introductory lessons on Probability, see
- Simple and simplest probability problems
- Solving probability problems using complementary probability
- Elementary Probability problems related to combinations
- A True/False test
- A multiple choice answers test
- A shipment containing fair and defective alarm clocks
- A drawer contains a mixture of socks
- Probability for a computer to be damaged by viruses
- Conditional probability problems
- Typical probability problems from the archive
- Experimental probability problems
- OVERVIEW of lessons on Probability
in this site.
Also, you have this free of charge online textbook in ALGEBRA-II in this site
- ALGEBRA-II - YOUR ONLINE TEXTBOOK.
The referred lessons are the part of this online textbook under the topic "Solved problems on Probability".
Save the link to this textbook together with its description
Free of charge online textbook in ALGEBRA-II
https://www.algebra.com/algebra/homework/complex/ALGEBRA-II-YOUR-ONLINE-TEXTBOOK.lesson
into your archive and use when it is needed.