#28
Grade C

revise!
try a random GCSE question...
Bobby has purchased some model cars off the internet.
When they are delivered he finds a number of them are faulty.

Condition Number of Cars
Perfect 30
Faulty 12





a) A car is chosen at random.
    What is the probability it is faulty?
    Give your answer as a fraction in its lowest terms.


b) Estimate how many cars would be faulty if Bobby purchased 350 model         cars.
   
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