Question

You randomly choose one of the tiles. Without replacing the first tile, you choose a second tile. What is the probability of the compound event? Write your answer as a fraction or percent rounded to the nearest tenth.

7,6, 5, 8, 9, 10, 20

The probability of choosing an odd number and then a 20 is

Answer 1

P odd number, then 20) = 1 /14

Explanation:

P( odd number) = number of odd numbers/ total

number of odd numbers = 3

total = 7

P( odd number) = 3/7

We keep the tile so that there are only 6 tiles left

P (20) = number of 20/ total

= 1/6

We multiply the probabilities together

P odd number, then 20) = 3/7 * 1/6 = 3/42 = 1 /14