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A five-rupee coin,3 two-rupee coins & 2 one rupee coins are stacked together in a column at random. The probability that the coins of the same denomination are consecutive is
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5 Answers
62there are 3! ways to arrange which denomination comes where!
total no of ways to arrange is
6!/(2!3!1!)
probability will be 3!/ {6!/(2!3!1!)}
11What do you mean "there are 3! ways to arrange which denomination comes where" ?
62it is wheter 5 rupee comes at top or 2 rupee or 1 rupee..
once u decided that there is not much arrrangement to do
a better way to look at this answer wud be
3!(3!.2!)/ 6!
but it depends on whihc u feel more natural