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Q.

A letter is known to have come either from 'TATANAGAR' or 'CALCUTTA'. On the envelope. Just two consecutive letters TA are visible. The probability that the letter comes from 'TATANAGAR' is

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a

411

b

711

c

511

d

611

answer is B.

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Detailed Solution

P(E)=2828+17=711
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A letter is known to have come either from 'TATANAGAR' or 'CALCUTTA'. On the envelope. Just two consecutive letters TA are visible. The probability that the letter comes from 'TATANAGAR' is