Xavier Aptitude Test 2020 Paper

Let the amount spent by Ashish is $a$, Banti is $b$ and Chintu is $c$. Given, $a = b = c$ One of them has bought a large bag. So, he must have spent at least $1000 \text{ rupees}$ It means, everyone has spent at least $1000$ Or, $a + b + c \geq 3000$. Revenue from small bags $= 50 \times 15 = 750$. Revenue from large bag $= 1000 \times 1 = 1000.$ Total revenue excluding from medium bag $= 750 + 1000 = 1750$ If 4 medium bags are sold, total revenue $= 200 \times 4 + 1750 = 2550$, which is less than $3000$ Hence, not the right answer. If 5 medium bags are sold, total revenue $= 200 \times 5 + 1750 = 2750$, which is less than $3000$. Hence, not the right answer. If 7 medium bags are sold, total revenue $= 200 \times 7 + 1750 = 3150$, which is more than $3000$. Hence, 7 is the correct answer.