Answer:
A = choosing a red marble
B = choosing a green marble
Probability of A happening = P(A) = 5/(3+5+4) = 5/12
Probability of B happening = P(B) = 4/(3+5+4) = 4/12
Probability of either happening = P(A) + P(B) = 5/12 + 4/12 = 7/12
The key word in their question is red OR green and that is why we add the two probabilities. If they ask the probability of them both happening (if they said red AND green), you would multiply P(A)*P(B).
8 employees exercise at least three times a week
<em><u>Solution:</u></em>
At the office where Mika works 41% of the 19 employees exercise at least three times a week
To find: Number of people who exercise at least three times a week
From given information,
Total employees = 19
Employees exercise at least three times a week = 41 % of total employees
Therefore, we have to evaluate 41 % of 19
Number of people exercise at least three times week = 41 % of 19

Thus approximately 8 employees exercise at least three times a week
Step-by-step explanation:
Here is the answer for the unkown n(k+m)
Answer: 9
Step-by-step explanation:
From doing the math I think it should be 9
Answer:
Circle A will be similar to circle B when circle A is dilated by a scale factor of 4.