SOLUTION: A survey of 100 commuters showed the following; 59 drove the freeway, 49 wore seat belts, 42 listened to the radio, 20 listened to the radio and wore seat belts,29 listened to the

Algebra ->  Linear-equations -> SOLUTION: A survey of 100 commuters showed the following; 59 drove the freeway, 49 wore seat belts, 42 listened to the radio, 20 listened to the radio and wore seat belts,29 listened to the       Log On


   

Question 63799: A survey of 100 commuters showed the following; 59 drove the freeway, 49 wore seat belts, 42 listened to the radio, 20 listened to the radio and wore seat belts,29 listened to the radio and drove the freeway, 31 drove the freeway and wore seat belts.12 did all three. How many did none of these things?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Using overlapping Venn cicles you get:
100-[(49+40+59)-(20+29+31)+12]
= 100-70
=30 did none of these things.
Cheers,
Stan H.