AIEEE Exam

A box contains 2 fifty-paise coins, 5 twenty five paise coins and a certain number n (-b) of ten and five paise coins. Five coins are taken out of the box at random. The probability that the total value of these 5 coins is less than one rupee and fifty paise is?

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AIEEE Other Question

If three squares are chosen at random on a chess board, then the chance that they should be in a diagonal line is?? There are 5 letters and 5 addressed envelopes. If the letters are put at random in the envelops, the probability that all the letters may be placed in wrongly addressed envelopes is