Question

a lady has Rs 5 and Rs 10 coins in her purse. if in all she has 7 coins totalling Rs 50, the number of coins of each type she has are​

Answer 1

3;5.....10;3coins they will have

Answer 2

Answer:

5 rupee coin =4, 10 rupee coin =3

Step-by-step explanation:

Let no of 5 rupee coin be X and no of 10 rupee coin be Y,

according to question

X+Y=7 (i)

5X+10Y=50 (ii)

multiplying (i) by 5 and then subtracting from (ii)

=5X + 10Y = 50

-5X -5Y =35

= 5Y =15

= Y=3

putting value of Y in (i)

X+Y =7

X=7-Y

X= 7-4 = 3