20 slips of paper are put into a bag numbered from 1 to 20. One slip is randomly selected from the bag. We are interested in selecting even numbers. What is the probability of selecting an even number from the bag?
well, 1/2 the numbers are even, right?
To find the probability of selecting an even number from the bag, we need to determine the number of favorable outcomes (even numbers) and the total number of possible outcomes.
First, let's determine the number of favorable outcomes, which is the number of even numbers in the bag. In this case, the even numbers are 2, 4, 6, 8, 10, 12, 14, 16, 18, and 20. Therefore, there are 10 even numbers.
Next, we need to determine the total number of possible outcomes, which is the total number of slips in the bag. In this case, there are 20 slips in the bag, numbered from 1 to 20.
Therefore, the probability of selecting an even number can be calculated by dividing the number of favorable outcomes by the total number of possible outcomes:
Probability = Number of favorable outcomes / Total number of possible outcomes
Probability = 10 / 20
Simplifying the fraction, we get:
Probability = 1/2
So, the probability of selecting an even number from the bag is 1/2, which can also be expressed as 0.5 or 50%.