Infosys Company Numerical Ability Permutation and Combination

two schools played against each other in a tennis tournament

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Infosys Other Question

A single letter is drawn at random from the word."ASPIRATION", the probability that it is a vowel is? After world war II three departments did as follows. First department gave some tanks to the 2nd and 3rd department equal to the number they are having. Then 2nd department gave some tanks to 1st and 3rd department equal to the number they are having. Then 3rd department gave some tanks to 1st and 2nd department equal to the number they are having. Then each department has 24 tanks. Find the initial no. of tanks of each department?