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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

A1

B3

C4

D2

Answer:

D. 2


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In a class of 15 students, 4 failed in English, 6 failed in Mathematics and 3 failed in both. How many passed in both the subjects?
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