there are two examination rooms A and B. If 10 students are sent from A to B , the number of students in each room because the same. If 20 candidates are sent from B to A, the number of students in A becomes double the number of students in B. What is the number of students in room A?
A. 100
B. 120
C. 130
D. 150
E. none of these
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সঠিক উত্তরঃ
A.
100
Explanation:
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