Question

Ramu has a total of Rs 100 as currency notes in the dinominations of Rs 20 and Rs 10.The number of 20 rupee notes is 2 more than the number of 10 rupee notes​

Answer 1

Answer:

Number of 10 rupee notes is 2

Answer 2

Answer: The number of Rs 20 notes is 4 and the number of Rs 10 notes is 2.

Step-by-step explanation:

Let the number of Rs 20 notes be x.

Let the number of Rs 10 notes be y.

Thus,

20x + 10y = 100         ...... (1)

The number of Rs 20 notes is 2 more that the number of Rs 10 notes. Thus,

x = y + 2                     ...... (2)

Substitute the value of x from equation (2) in equation (1).

$\begin{aligned}20(y+2)+10y&=100\\20y+40+10y&=100\\30y&=60\\y&=2\end{aligned}$

Substitute the value of y in equation (2).

$\begin{aligned}x&=2+2\\&=4\end{aligned}$