Question

There are 90 coins in bag they are 5 &10 paise coins, the total value is 7 rupess how many 5 paise coins are there in that bag

Answer 1

Answer:

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Answer 2

Answer:

Step-by-step explanation:

Total no: of coins = 90

Let no: of 5 paisa coins be 'a' 

Let no: of 10 paisa coins be 'b'

Given,

5*a + 10*b = 7 Rs = 700 paisa

a + b = 90....(i)

5*a + 10*b = 700...(ii)

(i)*10== 10*a + 10*b = 900...(iii)

(iii) - (ii)

5*a = 200

a = 40

b = 50

Number of 5 paisa coins = 40

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