How many such pairs of letters are there in t | vedclass

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(B) To find the number of such pairs,we compare the positions of letters in the word $CONSTABLE$ with their positions in the English alphabet.Word: $C

Vedclass · Accepted Answer

One

Vedclass · Answer

(B) To find the number of such pairs,we compare the positions of letters in the word $CONSTABLE$ with their positions in the English alphabet.Word: $C, O, N, S, T, A, B, L, E$Positions: $3, 15, 14, 19, 20, 1, 2, 12, 5$Checking pairs:$1$. $C$ to $E$: $C(3), D(4), E(5)$. There is one letter $(D)$ between them in the alphabet,and in the word $CONSTABLE$,there are $7$ letters between them. (No match)$2$. $A$ to $B$: $A(1), B(2)$. There are $0$ letters between them in the alphabet,and in the word $CONSTABLE$,there are $0$ letters between them. (Match: $1$ pair)$3$. $L$ to $E$: $E(5), F(6), G(7), H(8), I(9), J(10), K(11), L(12)$. There are $6$ letters between them in the alphabet,and in the word $CONSTABLE$,there are $3$ letters between them. (No match)Checking all forward and backward sequences,the only pair that satisfies the condition is $(A, B)$.Therefore,there is only $1$ such pair.

How many such pairs of letters are there in the word $CONSTABLE$,each of which has as many letters between them in the word as in the English alphabet?

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