Question

a bag contains some rs 5coins, rs 2coins,and rs 1coins with total number of coins being 52and the total amount being rs 125.the number of five rupee and two rupee coins are 37.the number of rs 5coins are _

Answer 1

let no. of 5 rs, 2rs,and 1rs coin be x, y ,z resp... then 5x+2y+z=125. & x+y=37 ,,also x+y+z=52 so z=15...now solve for x+y=37 and 5x+2y=110....you will get the answer...answer will be 12 rs5 coin and 25 rs 2 coin