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Conditional Probability

Three ships A...

Question

Three ships A, B and C sail from England to India. If the ratio of their arriving safely are 2 : 5, 3 : 7 and 6 : 11 respectively then the probability of all the ships for arriving safely is
[Pb. CET 2000]

A

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B

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C

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D

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Solution

The correct option is A

We have ratio of the ships A, B and C for arriving safely are 2 : 5, 3 : 7 and 6 :

11 respectively.

\The probability of ship A for arriving safely

Similarly, for and for C =

\ Probability of all the ships for arriving safely

=

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