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If on an average, 1 ship in every 10 is ...

If on an average, 1 ship in every 10 is sunk, find the chance that out of 5 ships expected 4 at least will arrive safely.

Text Solution

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The correct Answer is:
`((9)/(10))^(5)+""^(5)C_(4)((9)/(10))^(4)((1)/(10))`
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