Understanding Markets

Aarav buys something from a shop for ₹50. He thinks the whole ₹50 is the shopkeeper's profit. His sister says the shopkeeper does not get that much. Who is right?

Isha says buying vegetables straight from the farmer will always be cheaper than a shop, since the middle traders are cut out. Her brother says this is not always true. Who is right?

There are two sweet shops in the market. One is always crowded, the other less so. Sonu says the crowded shop must have better sweets — why else would so many people go? Is Sonu's reasoning sound?

Rohan says a big supermarket will always be cheaper than a small kirana shop, because it is big. His sister says being big is no guarantee of being the cheapest. Who is right?

The city doubled the bus fare. There is a tea stall next to the bus stop. Ravi says the stall will not be affected — what does the fare have to do with a tea stall? Is Ravi right?

Tanya assumes the price of tomatoes is the same across the whole city today — same day, same city. Her friend says the price can differ from place to place. Who is right?