The total of 324 of 20 paise and 25 paise make a sum of Rs. 71. The no: of 25 paise coins isQuestion 7Answera.124b.250c.125d.100
Question
The total of 324 of 20 paise and 25 paise make a sum of Rs. 71. The no: of 25 paise coins is?
a. 124
b. 250
c. 125
d. 100
Solution
Let's denote the number of 20 paise coins as x and the number of 25 paise coins as y.
From the problem, we know that:
- The total number of coins is 324, so x + y = 324.
- The total sum is Rs. 71. Since 1 Rupee = 100 paise, the total sum is 7100 paise. Therefore, 20x + 25y = 7100.
Now we can solve this system of equations step by step.
Step 1: Multiply the first equation by 20: 20x + 20y = 6480. Step 2: Subtract the first equation from the second: 5y = 620. Step 3: Solve for y: y = 620 / 5 = 124.
So, the number of 25 paise coins is 124. Therefore, the answer is (a) 124.
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