Question

The table below shows the number of survey subjects who have received and not received a speeding ticket in the last year, and the color of their car.

	Red Car	Not Red Car	Total
Speeding Ticket	19	47	66
No Speeding Ticket	478	456	934
Total	497	503	1000

Answer 1

P( a randomly chosen person has a red car) = 497/1000 = 0.497

P( a randomly chosen person has a speeding ticket) = 66/1000 = 0.066

P( a randomly chosen person has a speeding ticket given they have a red car) = 19/497 = 0.038

P( a randomly chosen person Has a red car given they have a speeding ticket) = 19/66 = 0.288

P( a randomly chosen person Has a red car and got a speeding ticket) = 19/1000 = 0.019

P( a randomly chosen person Has a red car or got a speeding ticket.) = (497 + 66 - 19)/1000 = 544/1000 = 0.544