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Billy and Bobbi each selected a positive integer less than 200. Billy's number is a multiple of 18, and Bobbi's number is a multiple of 24. What is the probability that they selected the same number? Express your answer as a common fraction.

Feb 1, 2020

#1
+18779
+1

If you and I both select numbers in the range from [1, 199], the probability that we match is 1/199.

After your number and my number have been selected, we can describe our numbers, such as yours is a multiple of 18 and mine is a multiple of 24; but this description, after the fact of choosing, does not change the probability of choosing.

Feb 1, 2020
#2
0

Thank you for the help, but what's the answer?

Guest Feb 1, 2020
#4
0

Are you blind, illiterate, or just fucking stupid?

Read Geno’s post. Do you see where he wrote, “If you and I both select numbers in the range from [1, 199], the probability that we match is 1/199.

That’s the answer. You are too dumb to know what to do with it, but that is the answer.

I recommend shoving it up your a s s, because that will get it closer to your brain.

Feb 1, 2020
edited by Guest  Feb 1, 2020
#5
0

I appreciate the kindness, Guest. However, 1/999 is wrong. The correct answer was 1/44.

Guest Feb 1, 2020
edited by Guest  Feb 1, 2020
#7
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I didn’t say Geno’s answer was correct; in fact, I was sure it was wrong; he’s often wrong for statistic or combination counting questions.  But, that was his answer.

I see you took my advice to shove it up your a s s, bringing it closer to your brain. This worked to your advantage, allowing you to figure out the answer on your own, or allowing you to recognize the answer from a different source.

Hopefully, your new found skill will also allow you to progress in literacy skills.  Glad to help!

P.S.

BTW, 1/44 isn’t correct either.

I suppose you’ll not see this because you’re looking for an enema to dislodge the wrong answers stuck up your a s s.   You’ll learn from experience that these are easily expelled after shoving the correct answer in.

Guest Feb 1, 2020
edited by Guest  Feb 2, 2020
#8
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Guest Feb 1, 2020
#6
0

For problems like these i suggest using stack exchange, they helped me alot!

Feb 1, 2020
#9
+108624
+1

Billy and Bobbi each selected a positive integer less than 200. Billy's number is a multiple of 18, and Bobbi's number is a multiple of 24. What is the probability that they selected the same number? Express your answer as a common fraction.

200/18 = 11.1111111111111111                  integer part 11

200/24=  8.3333333333333333               integer part 8

factor(18) = 2*3^2

factor(24) = 2^3*3

lowest common muultiple = 2^3* 3^2 = 8*9 = 72

So there is 2 commmone factors less than 200,       72 and 144

Probability that they both chose 72 = 1/11 * 1/8 = 1/88

Probability that they both chose 144 = 1/88

Probability that they both chose the same number = 2/88   =  1/44

Answering guest:  Why do you think that this is incorrect?

Feb 2, 2020
edited by Melody  Feb 2, 2020