Question

arya has rupees 300 in coins of denomination rupees 1 rs 2 rs 5 in her piggy bank the number of rs 1 coins is 5 times the number of rs 5 coins the total number of coins is 170.how many coins of each denomination are with her?

Answer 1

Let x be no of coins of re 1, y for Rs.2 and z for Rs.5

Then given information is equivalent to

x+y+z = 170:   x = 5z:    and x+2y+5z =300

Solving we get x = 100, y = 50 and z = 20