Quantcast Math Probability Question HELP? - XP Math - Forums
XP Math Home Sign Up FREE! | Sign In | Classroom Setup | Common Core Alignment PDF Version

Go Back   XP Math - Forums > Welcome > Off-Topic Discussion

 
 
Thread Tools Display Modes
Old 07-25-2007   #1
MLC_98_
Guest
 
Posts: n/a
Default Math Probability Question HELP?

In the United States 43 % of people wear their saftey belts. What is the random probability of picking out 2 people that wear their safety belts?How would I work this out? I've been gven no guidance
 
Old 07-25-2007   #2
vicky 7
Guest
 
Posts: n/a
Default

let the no of people be xtherefore people wearing that belts are 43*x/100 probability = 43*x/100 c 2 / x c2 [ c stands for combination] = this ans depends upon distict values of x.
 
Old 07-25-2007   #3
aviral17
Guest
 
Posts: n/a
Default

thr r more than one methods for this question.Let me tell u the simplest and easiest one.in 100 ppl,No. of ppl wearing seat belts:43No. of ppl not weraing seat belts:57hence,probability of picking 2 ppl who wear safety belt is43/100)*(42/99).The abov method shud b right.If answer dsnt match,report it immediately.I will review it.
 
Old 07-25-2007   #4
aldrian_math
Guest
 
Posts: n/a
Default

It can't be answered. It depends on the number of the people.
 
Old 07-25-2007   #5
Beth A
Guest
 
Posts: n/a
Default

It can't be accurately answered without knowing the number of people and whether or not a person can be picked twice. Without knowing the percentage the first person made up of the 43% percent, the probablility of the second person being chosen after the first person has been removed from the sample space cannot be known. Tell your teacher this and they'll either be insulted or impressed
 
 

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 03:14 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
XP Math