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CBSE Class 12-science Answered

a travel company hires 5 buses. chance of any bus to break down is 1/10 . if the company needs at least one bus on any day , find the probablity that 2 buses will break down on the same day. what is the probability that at least one bus is running on any day?
Asked by meghna | 24 Jan, 2014, 10:28: PM
answered-by-expert Expert Answer
The company has 5 buses 
 
Probability that a bus breaks down equals 1 over 10
i) Exactly two buses break down
 
Number of ways to select 2 buses out of 5 is  Error identifier "subscript" not found in transformation rule: SINGLEPOSTSCRIPT
Now we need that only two buses break down and other does not
 
Error identifier "subscript" not found in transformation rule: SINGLEPOSTSCRIPT
Answered by Avinash Soni | 08 May, 2014, 12:21: PM

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