Question

A sum of Rs. 625 is made up of 80 currency notes which are of either Rs. 10 or Rs. 5 denomination. The number of Rs. 10 notes are.
a) 35
b) 45
c) 40
d) 30​

Answer 1

Answer:

hii

your answer is here !

Step-by-step explanation:

option (b) is right answer !

follow me !

Answer 2

• Let Rs. 10 notes be x.

》A sum of Rs. 625 is made up of 80 currency notes which are of either Rs. 10 or Rs. 5 denomination.

So, Rs. 10 = 10x and Rs. 80 = (80 - x)

=> 10x + (80 - x)5 = 625

=> 10x + 400 - 5x = 625

=> 5x + 400 = 625

=> 5x = 625 - 400

=> 5x = 225

=> x = 225/5

=> x = 45

_____________________________

Number of Rs. 10 notes = 45.

_____________ [ ANSWER ]

_____________________________

☆ VERIFICATION :

From above calculations we have x = 45

Put value of x in this : 10x + (80 - x)5 = 625

=> 5x + 400 = 625

=> 5(45) + 400 = 625

=> 225 + 400 = 625

=> 625 = 625

_____________________________