if you are picking a number between 1-20 what is the probability that you pick a multiple of two or a number greater than 15?
Answers
The probability of an event happening is desired outcome/sample space.
For our sample space, it’s just the number of numbers: 20.
The outcome you want has some overlap: 6. 12. 18. So, we’ll subtract these as they fit both criteria.
Even numbers: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20 (10 numbers)
Multiples of 3: 3, 6, 9, 12, 15, 18 (6 numbers)
Pr(A or B) = Pr(A) + Pr(B) - Pr(overlap, also known as A intersect B)
Pr(even or mult. of 3) = 10/20 + 6/20 - 3/20 (the overlap)
= 13/20.
So, there is a 65% of you picking an even number or a multiple of three.
Answer:
Step-by-step explanation:
1.Number greater than 15 : 16, 17, 18, 19, 20
2.multiple by two : 2, 4, 6, 8, 10, 12, 14, 16, 18, 20
Same number of 1 and 2 : 16, 18, 20
I am not sure what is probability means.