Question

A consulting firm rents cars from three agencies such that 20% of the cars are rented fromagency A, 30% from agency B and 50% from agency C. It is known that 70% of the cars from A, 80% of the cars from B and 90% of the cars from C are in good condition. If
car taken on rent is in good condition, what is probability that it is from agency B?

CLASS 12TH ICSE SAMPLE PAPER 2018-19

MATHEMATICS

Answer 1

The members of a consulting firm rent cars from three rental agencies:
60% from Agency 1
30 % from Agency 2
10% from Agency 3. 
If 9% of the cars from Agency 1 need a tune-up, 
20 % of the cars from agency 2 need a tune up and 

6% of the cars from agency 3 need a tune-up,
what is the probability that a rental car delivered to the firm will need a tune -up? 
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Expected Value = 0.6*0.09 + 0.3*0.2 + 0.1*0.06 = 0.12 

Answer 2

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