At a cafe, Rama bought drinks for her 7 friends at ₹240. Some of them wanted coffee, while others wanted black tea. A regular cup of coffee cost ₹40 and a regular cup of black tea cost ₹ 30. How many cups of tea did she purchase?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 4.
Given that, total cost of drinks = ₹240
Cost of regular cup of coffee = ₹40
Cost of regular cup of tea = ₹30
Let the number of cups of tea she purchased be x.
⇒ Number of cups of coffee = 7 - x
According to the given question,
⇒ 30x + 40(7 - x) = 240
⇒ 30x + 280 - 40x = 240
⇒ 10x = 40
⇒ x = 4
Hence the number of cups of tea she purchased is 4.