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HomeXAT PYQsXAT 2013 Question PaperSara has just joined Facebook. She has 5 friends. Each…
XAT 2013Quantitative AbilityProbability, CombinatoricsHARD+1 / −0.25

Sara has just joined Facebook. She has 5 friends. Each of her five friends has twenty five friends. It is found that at least two of Sara's friends are connected with each other. On her birthday, Sara decides to invite her friends and the friends of her friends. How many people did she invite for her birthday party?

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