Of the set of numbers from 1-20 (including 1 and 20), what percent are even numbers?
a.10%
b. 30%
c. 50%
d. 70%
come on -- you know that half are even, half are odd, right?
50%
To find the answer, we need to determine the number of even numbers in the set of numbers from 1 to 20.
Even numbers are divisible by 2. So, we'll list the even numbers between 1 and 20: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20.
Counting these numbers, we find that there are 10 even numbers between 1 and 20.
Now, we can calculate the percentage of even numbers by dividing the number of even numbers (10) by the total number of numbers in the set (20) and multiplying by 100.
Percentage = (Number of Even Numbers / Total Number of Numbers) × 100
Percentage = (10/20) × 100
Percentage = 0.5 × 100
Percentage = 50
Therefore, the correct answer is:
c. 50%