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In the word MAJESTIC, each consonant is changed to the letter immediately preceding it in the English alphabetical order and each vowel is changed to the letter immediately succeeding it in the English alphabetical order. How many vowels are present in the new group of letters thus formed?

This question was previously asked in
RRB NTPC 2024 Undergraduate CBT 1 Question Paper (29-Aug-2025) (Shift 1)
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MAJESTIC Word Transformation: Vowel Count Analysis

This solution explains the process of transforming the word MAJESTIC based on specific rules for consonants and vowels and determines the final count of vowels in the transformed sequence.

Understanding the MAJESTIC Transformation Rules

The core task is to modify each letter in the word MAJESTIC. The rules depend on whether a letter is a vowel or a consonant:

  • Consonant Rule: Each consonant is replaced by the letter immediately preceding it in the English alphabet.
  • Vowel Rule: Each vowel (A, E, I, O, U) is replaced by the letter immediately succeeding it in the English alphabet.

To clarify the transformation, we can think about the position of each letter in the alphabet (where A is the 1st letter, B is the 2nd, and so on). Let \(P(X)\) denote the position of letter \(X\).

  • The transformation for a consonant \(C\) results in a new letter \(C'\) where \(P(C') = P(C) - 1\).
  • The transformation for a vowel \(V\) results in a new letter \(V'\) where \(P(V') = P(V) + 1\).

Applying the Rules to MAJESTIC

First, let's identify the letters in the word MAJESTIC and classify them:

Word: MAJESTIC

Letters: M, A, J, E, S, T, I, C

Classification:

  • Vowels: A, E, I
  • Consonants: M, J, S, T, C

Step-by-Step Letter Transformation

We will now apply the defined rules to each letter of MAJESTIC:

Original Letter Type Transformation Rule Applied New Letter
M Consonant Previous letter (\(P(M)=13 \rightarrow P(M')=12\)) L
A Vowel Next letter (\(P(A)=1 \rightarrow P(A')=2\)) B
J Consonant Previous letter (\(P(J)=10 \rightarrow P(J')=9\)) I
E Vowel Next letter (\(P(E)=5 \rightarrow P(E')=6\)) F
S Consonant Previous letter (\(P(S)=19 \rightarrow P(S')=18\)) R
T Consonant Previous letter (\(P(T)=20 \rightarrow P(T')=19\)) S
I Vowel Next letter (\(P(I)=9 \rightarrow P(I')=10\)) J
C Consonant Previous letter (\(P(C)=3 \rightarrow P(C')=2\)) B

Constructing the New Word

Combining the transformed letters gives us the new group of letters.

The original word MAJESTIC transforms into: LBIFRSJB.

Identifying Vowels in the Resulting Sequence

The final step is to count how many vowels (A, E, I, O, U) are present in the new sequence LBIFRSJB.

Let's check each letter:

  • L is a consonant.
  • B is a consonant.
  • I is a vowel.
  • F is a consonant.
  • R is a consonant.
  • S is a consonant.
  • J is a consonant.
  • B is a consonant.

By examining the letters, we find there is only one vowel ('I') in the sequence LBIFRSJB.

Final Count of Vowels

Therefore, the number of vowels present in the new group of letters formed after the transformation is one.

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