There are 18 number-tiles in a jar, each marked with a different number from 1-18. If you pull out
one tile at random, what is the probability that the number you pull will be an even number or a
prime number? (1 point)
0.833
0.889
0.944
0.722
First, let's find how many even numbers and prime numbers are there between 1-18:
Even numbers: 2, 4, 6, 8, 10, 12, 14, 16, 18 (Total of 9 numbers)
Prime numbers: 2, 3, 5, 7, 11, 13, 17 (Total of 7 numbers)
Now, we need to find the total number of even and prime numbers, considering that 2 is counted in both sets:
Total even and prime numbers: 9 (even) + 7 (prime) - 1 (overlapping number 2) = 15
Therefore, the probability of pulling out an even number or a prime number is:
Total favorable outcomes (even and prime numbers) / Total outcomes = 15/18 = 0.833
So, the correct answer is 0.833.