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There are 5 switches in a board. In these 5 switches 1 is attached with.........What will be the probability of success?

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There are 5 switches in a board.
In these 5 switches 1 is attached with the fan.
A person has to start the fan in 2 attempts only.
What will be the probability of success?

posted Jul 5 by Vikram Luthra

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