A spinner number 1-10 is spun. Each number is equally likely to be spun. What is the probability of spinning: 1. an odd number OR a power of three?

2. a number less than 8 OR a divisor of 15?

Each number has a 1 in 10 chance (1/10) of getting spun. There are 5 odd number and 5 even numbers, there is 1 number divisible by 3, there are 7 numbers less than 8, and to get 15 you multiply 3 by 5.

1. 5/10 (1/2) or 1/10

2. 7/10 or 2/10 (1/5)