Question

Alisha has only 1 and 2 coins with her.If the total number of coin's that she has is 50 and amount of money with her is
a) 35 and 15 b) 15 and 35) c) 35 and 20 d) 25 and 25​

Answer 1

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Let us take,

Re.1 coins as x

Rs. 2 coins as y

The total number or Re.1 and Rs.2 are 50

So x+y=50_______________________________(1)

Therefore, the total amount of Re.1 is 1x

Therefore, the total amount of Rs.2 is 2y

Total money is 75

Hence the sum of Total Re.1 amount + Total Rs.2 amount = 75

This is 1x+2y=75 ______________________________(2)

Equating Eqn. 1 and 2

x=50-y

Putting x in 1x+2y=75

1(50-y)+2y=75

y=25

Putting y in x=50-y

We get x = 50 – 25 = 25

Therefore, the number of Re.1 coin is 25 and Rs.2 coin is 25