we are given two probabilities of two events: P(A) = 0.25, and P(B) = 0.45. we are asked to determine P(A ∩ B) which has a formula of P(A) * P(B) equal to 0.25 *0.45 equal to 0.1125. P(A ∪ B) has a formula of P(A) + P(B) equal to 0.70. (c) P(A | B) is 0.25/0.45 equal to 0.56. (d) P(Ac ∪ Bc) is equal to (1-0.25)*(1-0.45) equal to 0.4125.
Answer:
70%
Step-by-step explanation:
We can first find the fraction
35/50
We know that percent is out of 100 so multiply the top and bottom by 100
35/50 * 2/2 = 70/100
The percent is 70%
So what this question is asking is which stress rating occurred least often. so if you look at the frequency side of the table, you need to look for the lowest number, because that is how many students rated their stress at that level. the lowest number is 3, and if you look at the stress rating side, it is 2. so part a. would be 2, and part b. would be 3
