You have the numbers 1–25 written on slips of paper. If you choose one slip at random, what is the probability that you will select a number that is divisible by 3

Question

anonymous · Answer

medal/Fan

geerky42 · Answer

How many numbers are there between 1 to 25 that is divisible by 3?

anonymous · Answer

There are a total of 25 possibilities and 7 "correct" possibilities (3,6,9,12,15,18 and 21). To find the probability we do $$P=\frac{correct}{total}=\frac{7}{25}$$ or 28%.

mathmale · Answer

One of the easier ways in which to visualize this problem would be writing out all 25 of the integers 1-25.  Then circle every one of those intergers that IS divisible by 3.

Count how many you've circled.  Then divide by the total number of numbered slips of paper.  The result is your probability.  Express it as a decimal fraction.

mathmale · Answer

@twvogels:  your answer, while correct, should have been found by shaunaalovesyou, and not by you.  Two people have given her hints regarding how to answer this question.  In what way do you presume that it helps when YOU do the work and give away the answer?  Please read the OpenStudy Code of Conduct and see what it has to say:  Give help, not answers.

anonymous · Answer

The question that was asked was 
     "what is the probability that you will select a number that is divisible by 3"

NOT
    "How do I find the probability"

If she wanted a solution, she would have asked for a solution and I would have been happy to provide one. But that's not what happened. She asked for an answer and an answer was provided. 

I don't presume anything. I provide what is asked for.

anonymous · Answer

i got 8/25

mathmale · Answer

Kindly read the Code of Conduct: http://openstudy.com/code-of-conduct Sorry, but your argument "I provide what is asked for" doesn't hold when the rules of the game clearly state, "Give help, not answers."

mathmale · Answer

As a reminder, @twvogels, OpenStudy is a private, educational site paid for by others, and as such it has the right to set up and enforce rules of the game.  Your argument is clever, but it ignores the Code of Conduct and thus doesn't hold water.

mathmale · Answer

@shaunaalovesyou :  I really respect and appreciate your getting involved in finding the answer to this question of yours.  Would you please list all of the numbers between 1 and 25 that are divisible by 3?  Then compare your list to that posted by another user, above.  Nice work on your part!

mathmale · Answer

And, Shauna, I apologize for my slow responses to your posts here.

anonymous · Answer

thankss and its okay