Question

a purse contains rs.550 in notes in denominations of rs.10 and rs.50. If the no. of rs.50 notes is one less than that of rs.10 notes, then find the no. of rs.50 notes?

Answer 1

let number of 50 rs. notes=A,

then numbers of 10rs. notes=(A+1),

now according to the question, we have

50A+10(A+1)=550,

50A+10A+10=550,

60A=550-10,

60A=540,

then

A=9,

therefore

number of 50 rs. notes=9