A bag contains 10-paisa, 20-paisa and 25-paisa coins in the ratio 7:4:3. If the total value is rs.90, then what is the number of 25- paisa coins in the bag? (a) 120 (b) 160 (c) 280 (d) 300
SukhenHR:
120
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3
let the ten paisa be 7x
20 paisa be 4x
25 paisa be 3x
then
number of 10 paisa coins =10x 7x
number of 20 paisa coins =20 x 4x
number of 25 paisa coin =25x 3x
90 rupees =9000paisa
atq
70 x+80x+75x =9000
225x =9000
x=9009÷225
x=40
no of 25 paisa coins =3x =3x40
=120
option a
20 paisa be 4x
25 paisa be 3x
then
number of 10 paisa coins =10x 7x
number of 20 paisa coins =20 x 4x
number of 25 paisa coin =25x 3x
90 rupees =9000paisa
atq
70 x+80x+75x =9000
225x =9000
x=9009÷225
x=40
no of 25 paisa coins =3x =3x40
=120
option a
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