TCS Company Numerical Ability Permutation and Combination

if x men,working x hours per day,can do x units of work in x day,then y men,working y hours per day would be able to complete how many units of work in y days

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TCS Other Question

there are 52 cards in a pack one card is missing . Two of the cards are selected at random. Find the probability that missing card is a spade 1,2,4,8,16,32,..