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A bag contains (2n + 1) coins. It is kno...

A bag contains (2n + 1) coins. It is known that n of these coins have a head on both sides whereas the rest of the coins are fair. A coin is picked up at random from the bag and is tossed. If the probability that the toss results in a head is `(31)/(42)`, then determine the value of n.

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The correct Answer is:
`n = 10`
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