Manasa has borrowed Rs. 50 and Swetha has borrowed Rs. 20 from their mother. How will you represent this on the number line? Suppose their father gave them Rs.100 each as pocket money, who will have more money after clearing the debit?

Sonu went to a shop. He wanted to buy a chiki and a toffee. One chiki costs ₹ 0.75 and a toffee costs ₹ 0.50. If he buys one each of them how much he has to pay to the shopkeeper. Sonu's mother gave him ₹ 2. He gave it to shopkeeper and bought items of ₹ 1.25. How much he will get in return ? Suppose if his mother gave her ₹ 5 then how much will the shopkeeper return ?

A fair coin is tossed four times, and a person win Re 1 for each head and lose Rs 1.50 for each tail that turns up. From the sample space calculate how many different amounts of money you can have after four tosed once. Find the probability of getting.