If each vowel in the word DUSTER is changed to the letter following it in the English alphabetical order and each consonant is changed to the letter preceding it in the English alphabetical order, how many letters will appear twice in the group of letters thus formed?

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If each vowel in the word DUSTER is changed to the letter following it in the English alphabetical order and each consonant is changed to the letter preceding it in the English alphabetical order, how many letters will appear twice in the group of letters thus formed?

AThree

BOne

CTwo

Dzero

Answer:

D. zero

Read Explanation:

Let's apply the rules to the word DUSTER letter by letter:

Vowel Rule: Change to the following (+1) letter.
Consonant Rule: Change to the preceding (-1) letter.

Original Letter	Type	Operation	New Letter
D	Consonant	-1 (C $\leftarrow$ D)	C
U	Vowel	+1 (U $\rightarrow$ V)	V
S	Consonant	-1 (R $\leftarrow$ S)	R
T	Consonant	-1 (S $\leftarrow$ T)	S
E	Vowel	+1 (E $\rightarrow$ F)	F
R	Consonant	-1 (Q $\leftarrow$ R)	Q

Analyzing the New Group: C, V, R, S, F, Q

Looking closely at the formed letters:

C: appears 1 time
V: appears 1 time
R: appears 1 time
S: appears 1 time
F: appears 1 time
Q: appears 1 time

None of the letters in this new group appear twice. Therefore, the answer is 0 (no letters appear twice).

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