
Algebra PreAlgebra and Basic Algebra Math Forum 
 LinkBack  Thread Tools  Display Modes 
April 20th, 2017, 12:01 AM  #1 
Senior Member Joined: Jan 2017 From: US Posts: 104 Thanks: 5  Probability in Algebra Solve for the probability that a student is selected at random from a group of 20 students will draw a 6 from a bag with the numbers 1 though 15 in it. Show and explain all of your work. Could anyone tell me how I would go about this? Thanks 
April 20th, 2017, 12:49 AM  #2 
Senior Member Joined: Sep 2015 From: USA Posts: 1,780 Thanks: 919 
does it matter which student is chosen? Well there's nothing in the problem that would lead you to believe one student will chose any differently than any other student so no. Thus the bit about choosing a student at random doesn't matter at all. What's the probability that any student will choose a 6 out of the 15 tiles. Well there's only one 6 out of the 15 so the probability is $p=\dfrac {1}{15}$ 
April 20th, 2017, 01:31 AM  #3  
Senior Member Joined: Jan 2017 From: US Posts: 104 Thanks: 5  Quote:
 
April 20th, 2017, 03:24 AM  #4  
Senior Member Joined: May 2016 From: USA Posts: 916 Thanks: 366  Quote:
"A student is selected at random from a group of 20 students will draw ..." The verb "will draw" has no subject. Romsek assumes quite sensibly that the intended subject is "the student, who is selected ..., will draw." He then deduces correctly that how the student is selected is irrelevant to whether that student draws a 6. I agree if that is the intended problem. But that very minimal addition to the words of the given problem may not be the correct addition needed to get to the intended problem. Is the problem you gave the complete and exact wording of the problem in your text? If not, what is the complete and exact wording?  

Tags 
algebra, probability 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Probability  Sigma algebra  Niladri  Advanced Statistics  3  June 29th, 2016 03:00 AM 
Geometry(Triangle)/Algebra(Probability) Problem  ItisBowtime  Geometry  2  April 2nd, 2013 08:34 PM 
Algebra 2 probability  Espanol  Algebra  2  June 16th, 2009 03:36 PM 
Probability and Algebra problem  MATHguerilla  Algebra  2  August 21st, 2008 01:44 PM 
Probability and Algebra problem  MATHguerilla  Abstract Algebra  1  December 31st, 1969 04:00 PM 