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Answer :

Number of bananas bought in Rs180 = 4 dozens

= 4 × 12 = 48 bananas

Number of bananas bought in Rs 1 = \(\frac{48}{180} \)

So, number of bananas bought in Rs 90 = \(\frac{48}{180} \) × 90 = 24 bananas

\(\therefore \) 24 bananas can be purchased in Rs 90

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