4. A spinner is divided into 10 equal sections numbered from 1 to 10. You spin the spinner once. What is P(not even)?
Pretty sure the answer is 1/5, if I'm right, please explain how you got 1/5. Thanks
there are five even numbers, out of ten.
Pr(even)=5/10=1/2
pr(not even)=1-5/10=5/10=1/2
Wouldn't you get an odd number about half the time?
To find the probability of an event, you need to determine the total number of favorable outcomes and divide it by the total number of possible outcomes. In this case, we want to find the probability of spinning a number that is not even.
There are two ways to approach this problem:
1. Count the favorable outcomes:
Out of the 10 possible numbers (1 to 10), there are 5 numbers that are not even (1, 3, 5, 7, 9). Therefore, there are 5 favorable outcomes.
2. Count the total outcomes:
Since the spinner is divided into 10 equal sections, the total number of possible outcomes is 10.
Now, we can calculate the probability:
P(not even) = (# of favorable outcomes) / (# of total outcomes)
P(not even) = 5 / 10
P(not even) = 1/2
Therefore, the probability of spinning a number that is not even is 1/2, which is equal to 0.5. It is not 1/5.