A certain sum of money consists of 30 coins, some of which are 10 paisa coins and the rest are 5 paisa coins. If the total value of the coins is Tk. 2, what is the number of 10 paisa coins?

A 15
B 12
C 10
D 5

Correct Answer: 10

If the number of 10 paisa coins is T then the number of 5 paisa coins is (30 - T). 2 TK ≡ 200 paisa ATQ,   10T + 5(30 - T) = 200 Or,   10T + 150 - 5T = 200 Or,   5 T = 200 - 150 So,   T = 10.
Bissoy MCQ
#গণিত #পাটিগণিত প্রাথমিক ধারণা (Basic Concept) #Dhaka Bank Ltd #Dhaka Bank Ltd - MTO - 2004

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