# A purse contains some Rs 5 and Rs 10 coins.if the total numbers of these coins is 20 and the total value of these coins isRs 165.Find the number of 10 rupee coins in the purse

2
by mitulVala246

Log in to add a comment

by mitulVala246

Log in to add a comment

no. of Rs10 coin= 20-x

now

5x + 10(20-x)= 165

5x + 200 - 10x = 165

-5x = -35 (taking 200 to RHS)

x=7

therefore RS 5 coins =7

RS10 coins= 20-7=13

so 10 rp coins = 20-x

now

5*x + 10 (20-x) = 165

5x + 200 -10x = 165

-5x = -35

x = 7

5 rp coins = 7

10 rp coins = 13