👆🏼Calculate

👇🏼Masha buys 25 roses for £62.50 and then sells each rose for £3. What percentage profit does she make?

🖐🏼A bag contains 11 counters, 4 of which are white, with the rest red. Gaz chooses a counter at random, notes its colour and then replaces it. He then chooses a second counter at random. What is the probability that the two counters he chooses have different colours?

👉🏼Sasha is choosing an email password. Her password must have 3 lowercase letters followed by 3 numerical digits (i.e. from 0 to 9). How many different possible passwords can she choose?

👈🏼Calculate the area shaded white in the diagram below: