Published by:
CGP EDU Academic Team
Published on: August 14, 2026
A letter is known to have come either from LONDON or CLIFTON; on the postmark only the two consecutive letters ON are legible. The probability that it came from LONDON is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
We define the following events :
Selecting a pair of consecutive letter from the word LONDON.
Selecting a pair of consecutive letters from the word CLIFTON.
E : Selecting a pair of letters ‘ON’.
Then 
as there are 5 pairs of consecutive letters out of which 2 are ON.
as there are 6 pairs of consecutive letters of which one is ON.
∴ ∴ The required probability is
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