Question

PAYAEWT
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notes of each denomination does she have!
15. I have a total of 300 in coins of denomination * 1, 2 and 35. The
number of72 coins is 3 times the number of 5 coins. The total number of
coins is 160. How many coins of each denomination are with me?
16 The organisers of an essay competition decide that a winner in the
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Answer 1

Step-by-step explanation:

let number of Rs 5 coin =x

given number of the Rs 2 coins is 3 times number of Rs 5 coins

therefore number of Rs 2 coins=3

Also given that,

total number of coins =100

no.of Rs 5 coins + no.of Rs 2 coins + no.of Rs 1 coins =160

x+3x + number of Rs 1 coins =160

4x+number of Rs 1 coins=160

number of Rs 1 coins =160-4x

given,

total amount =Rs 300

160-4x+6x+5x= 300

160-4x+11x=300

160+7x=300

7x=300-160

7x=140

X=140÷7

x=20

therefore,

no.of Rs 5 coins =x=20

no.of Rs 2 coins =3x=3 x 20=60

no.of Rs 1 coins =160-4x = 160- 4 x 20 = 160-80=80