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Question 10
How many such pairs of letters are there in the word SEARCHES each of which has as many letters between them in the word as in the English alphabet ?
Solution
SEARCHES
In the word, A and C have one letter between them , in alphabetical order A and C have only letter B between them
C and E have one letter between them , in alphabetical order C and E have only letter D between them
A and E have three letter between them , in alphabetical order A and E have three letters B, C and D between them
Therefore, (A,C) ; (C,E) and (A,E) are three pairs which satisfy the given condition.
Option D is correct
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