SOLUTION: One number is selected from the set {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}. What is the probability that the number selected is less than 8 or even?

Algebra ->  Permutations -> SOLUTION: One number is selected from the set {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}. What is the probability that the number selected is less than 8 or even?      Log On


   



Question 857044: One number is selected from the set {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}. What is the probability that the number selected is less than 8 or even?
Found 2 solutions by ewatrrr, Fombitz:
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 
Hi,
+highlight_green%2812%29 numbers {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}
7 numbers are <8 and there are 6 even numbers
P(number selected is less than 8 0r even) = 7/12 + 6/12 - 3/12

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
12 numbers in total.
Seven are less than 8.
Six are even.
3 are less than 8 and even.
P=7%2F12%2B6%2F12-3%2F12
P=10%2F12=5%2F6