A man spent exactly $2.50 on 3¢, 6¢ and 10¢ stamps. If he bought 10 3¢ stamps and twice as many 6¢ stamps as 10¢ times, how many 10¢ stamps did he buy?
A. 5
B. 10
C. 12
D. 15
E. 20
সঠিক উত্তরঃ
B.
10
Explanation:
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