Grade C


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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