Problem Solving (PS) | Re: Marty has a coin collection, which consists of only New World and Old

\(\frac{Nw}{Ow}\)=3=> Nw= 3Ow

After the swap
Nw-28= Ow+28
=>3 Ow-28= Ow+28
=>2Ow= 56
=>Ow= 28
Nw=3ow= 28*3= 84

Total coins originally = 84+28=112

Ans- C

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