Count each 7 which is NOT immediately preceded by 5 but is immediately followed by either 2 or 3. How many such 7 are there? 57265738373257273482678
A
2
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B
3
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C
4
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D
5
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Solution
The correct option is B 2 In the given series, 57265738373257273482678, there are 2 such 7's that are not immediately followed by 5 but are immediately followed by 2 or 3. Answer is Option A