I will sell tickets for 10 pesos

Each player must put a cross through 2 numbers on the ticket and hand it in.At the end of the week i will draw out two balls from a bag.

Every playerwho has chosen the same two numbers as shown on the balls will win a cash prize 100 pesos

How many ways are there of choosing two different numbers on the ticket? Show all your works.



Hi i really really need points and hello again