Final answer:
To find the probability of selecting a multiple of 2 or a multiple of 5 from the integers 1-20, we divide the number of multiples of 2 or 5 by the total number of integers.
Step-by-step explanation:
To find the probability of selecting a multiple of 2 or a multiple of 5 from the integers 1-20, we need to determine the number of integers that are multiples of 2 or 5, and divide it by the total number of integers from 1 to 20.
The multiples of 2 are 2, 4, 6, 8, 10, 12, 14, 16, 18, 20.
The multiples of 5 are 5, 10, 15, 20.
There are a total of 10 numbers that are multiples of 2 or 5.
The total number of integers from 1 to 20 is 20.
Therefore, the probability of selecting a multiple of 2 or a multiple of 5 is 10/20, which simplifies to 1/2.