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Refer to the following letter series and answer the question that follows. Counting to be done from left to right. (Left) D J L O E A H O A F A G E B G A N R S H X (Right) How many such consonants are there, each of which is immediately preceded by a consonant and also immediately followed by a vowel?
Three
One
Two
None
Two
Scan for sequences of three characters where the middle is a consonant, flanked by a preceding consonant and a following vowel (C-C-V).
Scan for sequences of three characters where the middle is a consonant, flanked by a preceding consonant and a following vowel (C-C-V).
Analyze the series
The given series is D J L O E A H O A F A G E B G A N R S H X. Identify vowels (A, E, O) and consonants (D, J, L, H, F, G, B, N, R, S, X).
Search for C-C-V pattern
We look for a sequence of 3 characters: (Consonant)-(Consonant)-(Vowel). Let's check: D(C)J(C)L(C) - No. J(C)L(C)O(V) - YES (1). L(C)O(V)E(V) - No. E(V)A(V)H(C) - No. H(C)O(V)A(V) - No. O(V)A(V)F(C) - No. A(V)F(C)A(V) - No. F(C)A(V)G(C) - No. A(V)G(C)E(V) - No. G(C)E(V)B(C) - No. E(V)B(C)G(C) - No. B(C)G(C)A(V) - YES (2). G(C)A(V)N(C) - No. A(V)N(C)R(C) - No. N(C)R(C)S(C) - No. R(C)S(C)H(C) - No. S(C)H(C)X(C) - No.
Final count verification
The occurrences of the pattern Consonant-Consonant-Vowel are: 1. JLO (J is C, L is C, O is V), 2. BGA (B is C, G is C, A is V). There are exactly 2 such occurrences.
A: Three is incorrect because only two patterns exist. B: One is incorrect as it misses the second valid set. D: None is incorrect as the patterns exist clearly in the string.
C is correct because the sequence JLO and BGA are the only two instances in the series that satisfy the condition of a consonant preceded by a consonant and followed by a vowel.
When solving letter series questions, write vowels and consonants above the characters to make identifying triplets much faster.
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