Question

Please answer my questions. ​

Answer 1

Q19

Let No. of 25 Paisa coins be x

and No. of 50 Paisa coins be y

So, According to question,

x+y=30 -(1)

x=4y -(2)

Putting x=4y in (1)

5y=30

=> y=6

Now putting y=6 in (2)

x=4*6

=> x=24

Therefore, there are 24 25-paisa coins and 6 50-paisa coins

Q20

Let the price of the pen be x

Then According to question,

5x=3x+17

=>5x-3x=17

=>2x=17

=>x=17/2 =8.5

Hence the price of the pen is rupees 8.5.