What’s the Error? A clothing store charges Rs 1024 for 4 T-shirts. A student says that the unit price is Rs 25.6 per T-shirt. What is the error? What is the correct unit price?

What’s the Error? An analysis showed that 0.06 per cent of the T-shirts made by one company were defective. A student says this is 6 out of every 100. What is the student’s error?

What’s the Error? A student said that the ratios and were proportional. What error did the student make?

A tea merchant blends two varieties of tea in the ratio of 5 : 4. The cost of first variety is Rs 200 per kg and that of second variety is Rs 300 per kg. If he sells the blended tea at the rate of Rs 275 per kg, find out the percentage of her profit or loss.

A piece of cloth 5 m long shrinks 10 per cent on washing. How long will the cloth be after washing?