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1. There are five $5 and three $10 bills in a bag. A person reaches in and pulls out two bills. What is the probability of the sum of the bills will be $10, $15 or $20?

 

2. A state offers specialty license plates that contain 2 letters followed by 2 numbers. License plates are assigned randomly. All license plates are equally likely. What would the probability of being assigned a license plate that contains exactly one "Y." 

 

Thank You As Always CPhill & Others.... You Are Very Helpful!

 

Sincerely,

Indian Tech Support

MrPatel  Mar 31, 2017
edited by MrPatel  Mar 31, 2017
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2+0 Answers

 #1
avatar+75328 
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2.  The "Y"  could either appear in the first position or the second position.......assuming that zeroes are allowed, we have 

 

[ 2 * 25 * 10 * 10 ]   license plates containing only one "Y"

 

And the total possible plates  is   [ 26^2 * 10^2]

 

So....the probability =

 

[ 2 * 25 * 10 * 10 ] / [ 26^2 * 10^2 ]   =  25 / 338

 

 

cool cool cool

CPhill  Mar 31, 2017
edited by CPhill  Mar 31, 2017
 #2
avatar+89774 
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I already answered Q1 elsewhere.

 

If you do not get an answer in a timely manner then you can draw attention to your orriginal question by writing a new post that directs people to the original post.

Just state that you would still like and answer or that you would like more explanation please, or whatever you want to say.

Otherwise 2 different people  are likely to answer and you are wasting peoples time.

Melody  Mar 31, 2017

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