After spending 4/9 of her money, a girl has 25 rupees left. How much did the she spend?
Answer: 20
Explanation
She spent 4/9 of her money, which means she spent (4/9)x rupees.
She has 25 rupees left, which means she has (5/9)x rupees left (since 1 - 4/9 = 5/9).
We know that (5/9)x = 25, so we can solve for x:
x = 25 x (9/5)
x = 45
So, the girl had 45 rupees initially.
She spent (4/9) x 45 = 20 rupees.
The correct answer is: 20
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