You are using a spinner with the numbers 1-10 on it. Find the probability that the pointer will sto

You are using a spinner with the numbers 1-10 on it. Find the probability that the pointer will stop on an odd number or a number less than 4.

We want P(odd number) or P(n<4).

• Odd numbers are {1, 3, 5, 7, 9}
• n < 4 is {1, 2, 3}

We want the union of these 2 sets:
{1, 2, 3, 5, 7, 9}

We have 6 possible pointers in a set of 10.
6/10 = 3/5 = 0.6 or 60%