How many pairs of letters in the word DABBLE | vedclass

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(C) To find the number of pairs of letters in the word $DABBLE$ that have the same number of letters between them as in the English alphabet,we check

Vedclass · Accepted Answer

Two

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(C) To find the number of pairs of letters in the word $DABBLE$ that have the same number of letters between them as in the English alphabet,we check both forward and backward directions:$1$. Forward direction:- $D$ to $A$: $0$ letters between them in the word,but $2$ letters $(B, C)$ in the alphabet. (No)- $D$ to $B$: $1$ letter $(A)$ between them in the word,$1$ letter $(C)$ in the alphabet. (Yes,$D-B$ is a pair)- $D$ to $B$: $2$ letters $(A, B)$ between them in the word,$1$ letter $(C)$ in the alphabet. (No)- $A$ to $B$: $0$ letters between them in the word,$0$ letters in the alphabet. (Yes,$A-B$ is a pair)- $A$ to $B$: $1$ letter $(B)$ between them in the word,$0$ letters in the alphabet. (No)- $B$ to $L$: $1$ letter $(B)$ between them in the word,$9$ letters in the alphabet. (No)$2$. Backward direction:- $E$ to $L$: $0$ letters between them in the word,$5$ letters in the alphabet. (No)- $L$ to $B$: $1$ letter $(B)$ between them in the word,$9$ letters in the alphabet. (No)Thus,the pairs are $(D, B)$ and $(A, B)$.There are $2$ such pairs.

How many pairs of letters in the word $DABBLE$ have as many letters between them in the word as in the alphabet?

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