Gate Exam Numerical Ability

a canteen require 798 bananas for a week. Totally how many bananas will it require for the months of january, febuary and march.

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Gate Other Question

a gambler has 4 coins in her pocket. two are double headed one is doubled tailed and one is normal.the coins can not be distinguished unless one looks at them.
the gambler takes a coin at random,opens her eyes and sees the the upped face of the coin is a head .what is the probability that the lower face is a head?
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