A man purchased some oranges at 4 oranges for Rs 7 and sold them at 7 oranges for Rs 13. Thus he gained Rs 30 in all. The number of oranges he bought is

A252

B280 ✓ Correct

C308

D336

Correct answer: (B) 280

Explanation

He bought 280 oranges.

Cost price per orange = 7/4 = 1.75.

Selling price per orange = 13/7.

Profit each = 13/7 - 7/4 = (52 - 49)/28 = 3/28.

Number = 30 / (3/28) = 280.

Want more like this? Create a free account to practise a full test, track your progress, and get spaced-repetition review.