Key

A key to room number C_(3) is dropped into a jar with five other keys,and the jar is throughly mixed.If keys are randomly drawn from the jar without replacement until the key to room C_(3) is chosen.then what are the odds in favour that the key to room C will be obtained on the 2^(nd) try?

To open a lock, a key is taken out from a collection of n keys at random. If the lock is not opend with this key, it is put back into the collection and another key is tried. The process is repeated again and again. If it is given that with only one key in the collection, the lock can be opend, then the probability that the lock will open in n trials, is

The password of a company “There is a big below” is changed into “big a there below is”. If the changed password is “key success to the master” then what will be the input? 1) to master success key the 2) the master key to success 3) key to the success to master 4) success to key the master 5) None of these