A bag contains tiles with numbers 1-30 on them.You randomly choose a tile from the bag.what is the probability that you choose an odd number or number that is a multiple of 4?

Answer 1

First you count the odd tiles: 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29 = 15 tiles

Next you count the multiples of 4: 4, 8, 12, 16, 20, 24, 28 = 7 tiles

Add the number of tiles together : 22 tiles

Check to see if any tiles are double counted and subtract those (there are no such tiles)

probability is 22 out of 30.