A man has Rs. 480 in the denominations of one-rupee notes, five-rupee notes and....

[diksha]

A man has Rs. 480 in the denominations of one-rupee notes, five-rupee notes and ten-rupee notes. The number of notes of each denomination is equal. What is the total number of notes that he has ?

A. 45 B. 60
C. 75 D. 90

Solution:let the number of notes be x
so x+5x+10x = 480
16x = 480
x = 480/16 => 30
number of notes are 3, so 3x => 3*30 = 90

 

[stapel]

A man has Rs. 480 in the denominations of one-rupee notes, five-rupee notes and ten-rupee notes. The number of notes of each denomination is equal. What is the total number of notes that he has ?

A. 45 B. 60
C. 75 D. 90

Solution:let the number of notes be x
so x+5x+10x = 480
16x = 480
x = 480/16 => 30
number of notes are 3, so 3x => 3*30 = 90

If x stands for "the number of notes" and x = 30, then there are thirty notes. Did you perhaps mean that x stands for "the number of notes in each denomination"? If so, then your solution makes more sense.

But to confirm your result, you need to plug your answer back into the original exercise. If you have thirty of each note, how much money do you have, in total? If you arrive at a total of 480 rupees, then your solution "checks" and you're good.