Bobby, an office secretary, typed 6 letters, each of which had either 1 or 2 pages. If Bobby typed 10 pages in all, how many of the letters had 2 pages?
A. 1
B. 2
C. 4
D. 5
E. None of these
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সঠিক উত্তরঃ
C.
4
Explanation:
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