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Intersection of Sets

Out of the le...

Question

Out of the letters E, T and N, a 3 letter word is formed at random using all the 3 letters. What is the probability that the word formed is TEN ?

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Solution

Total number of three letter words formed with letters E, T and N = 6 out of which TEN is one word.
So, P(TEN formed) = 1/6

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