My Math Forum  

Go Back   My Math Forum > High School Math Forum > Probability and Statistics

Probability and Statistics Basic Probability and Statistics Math Forum


Reply
 
LinkBack Thread Tools Display Modes
June 21st, 2011, 06:06 AM   #1
Newbie
 
Joined: Jun 2011

Posts: 3
Thanks: 0

licensed driver probability

I am having trouble knowing if I add or multiply with this problem:

Male Female
Age 19 and under 4746 4517
Age 20 1625 1553
Age 21 1679 1627

Choose one driver at random. Find the probability that the driver is Male and 19 or under.


Now, do I find the product of the number of males and the number of drivers 19 or under? Or do I add and subtract:
(the number of males) + (number of 19 or under) - (number of males that are 19 or under)
bullshark818 is offline  
 
June 21st, 2011, 06:08 AM   #2
Newbie
 
Joined: Jun 2011

Posts: 3
Thanks: 0

Re: licensed driver probability

Age 19 and under
male:4746
female: 4517

Age 20
male:1625
female:1553

Age 21
male:1679
female:1627
bullshark818 is offline  
June 21st, 2011, 06:23 AM   #3
Global Moderator
 
greg1313's Avatar
 
Joined: Oct 2008
From: London, Ontario, Canada - The Forest City

Posts: 7,963
Thanks: 1148

Math Focus: Elementary mathematics and beyond
Re: licensed driver probability

The solution is (number of males 19 and under)/(total number of drivers) = 4746/(4746 + 4517 + 1625 + 1553 + 1679 + 1627)
= 4746/15747 = 1582/5249 ? 0.30 ? 30%.
greg1313 is offline  
June 21st, 2011, 06:34 AM   #4
Newbie
 
Joined: Jun 2011

Posts: 3
Thanks: 0

Re: licensed driver probability

Quote:
Originally Posted by greg1313
The solution is (number of males 19 and under)/(total number of drivers) = 4746/(4746 + 4517 + 1625 + 1553 + 1679 + 1627)
= 4746/15747 = 1582/5249 ? 0.30 ? 30%.
Thanks! I should have known it would have been as simple as that.
bullshark818 is offline  
June 21st, 2011, 06:49 AM   #5
Math Team
 
Joined: Dec 2006
From: Lexington, MA

Posts: 3,267
Thanks: 408

Re: licensed driver probability

Hello, bullshark818!

Quote:
I am having trouble knowing if I add or multiply with this problem.[color=beige] . [/color][color=blue]Neither![/color]



Choose one driver at random.
Find the probability that the driver is Male and 19 or under.

This is the simplest possible probability problem!

There are 4746 drivers who are male and 19 or under.
There is a total of 15,747 drivers.



soroban is offline  
Reply

  My Math Forum > High School Math Forum > Probability and Statistics

Tags
driver, licensed, probability



Search tags for this page
Click on a term to search for related topics.
Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
probability set theory - probability of x out of n events hbonstrom Applied Math 0 November 17th, 2012 07:11 PM
Joint probability density function, probability token22 Advanced Statistics 2 April 26th, 2012 03:28 PM
Probability (probability mass function,pmf) naspek Calculus 1 December 15th, 2009 01:18 PM





Copyright © 2019 My Math Forum. All rights reserved.