SOLUTION: A survey of 1000 people were asked whether they wear eyeglasses while driving. These people were also tested to see whether they need to wear eyeglasses while driving. 440 wear

Algebra.Com
Question 1162349: A survey of 1000 people were asked whether they wear eyeglasses while driving.
These people were also tested to see whether they need to wear eyeglasses
while driving.
440 wear glasses and need to wear them
20 wear glasses and do not need to wear them
140 don't wear glasses but need to wear them
400 don't wear glasses and don't need to wear them
What is the probability that they wear glasses while driving even though they
do not need to wear them?
Answer by ikleyn(52814)   (Show Source): You can put this solution on YOUR website!
.

The question in this post 

    What is the probability that they wear glasses while driving even though they do not need to wear them?

is posed  INCORRECTLY,  since it does not define who are that  "they".


A  RIGHT  question should be 

    If a person is selected randomly from these 1000 people, 

    then what is the probability that he (or she) wears glasses while driving even though he (or she) does not need to wear them?

Then the answer,  as it is  OBVIOUS,  is    = .

------------

Your post is fixed;  the problem is solved;  the question is answered and the solution is completed.



RELATED QUESTIONS

in a survey, people were asked if they plan to buy a new computer this year. Of those who (answered by Fombitz)
A survey was conducted to determine whether people were connected to the internet at... (answered by macston)
Assume that a sample is used to estimate a population mean . A botanist wishes to... (answered by ikleyn)
Two-hundred fifty people were asked whether they have seen various types of movies at a... (answered by stanbon)
a total of 800 people were interviewed and asked to name the Vice President of the U.S.... (answered by stanbon)
six people were asked to determine the amount of money they were carrying, to the nearest (answered by edjones)
In a school survey, students were asked whether they would approve of a school uniform.... (answered by ewatrrr)
In a survey, 30 people were asked how much they spent on their child's last birthday... (answered by math_tutor2020)
In a survey, 10 people were asked how much they spent on their child's last birthday... (answered by math_tutor2020)