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In Number sequece questions, you are given a long series of numbers. It is required to find out how many times a number satisfying conditions, specified in the questions, occurs.

How many 7's are there in the following series which are not immediately followed by 3 but immediately preceded by 8 ?
8  9  8  7  6  2  2  6  3  2  6  9  7  3  2  8  7  2  7  7  8  7  3  7  7  9  4

Option:
A. 10
B. 3
C. 2
D. 0
E. None of these
Answer: C . 2

Justification:

8  9  8  7  6  2  2  6  3  2  6  9  7  3  2  8  7  2  7  7  8  7  7  7  9  4

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