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CBSE Class 10 Answered

Rohan has 10 coins consisting of nickels, dimes, and quarters. Seven of the coins are either dimes or quarters, and eight of the coins are either dimes or nickels. How many dimes does Rohan have?
Asked by Saurabh Budholiya | 02 Mar, 2011, 03:33: PM
answered-by-expert Expert Answer
Dear Student,
  
Here is the solution:
  
let Dimes = D, Nickels = N and Quarters = Q
  
D+Q = 7............ (i)
D+N = 8............ (ii)
D+Q+N = 10............ (iii)
 
 
Subtituting the value of (i) in (iii)
7+N=10
N=3
 
Putting the value of N in (ii)
D=5
Hence there are 5 dimes.
Regards
Team Topperlearning
 
Answered by | 02 Mar, 2011, 09:27: PM

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