SOLUTION: Assume that an event A contains 10 observations and event B contains 15 observations. If the intersection of events A and B contains exactly 3 observations, how many observations a

Question 472828: Assume that an event A contains 10 observations and event B contains 15 observations. If the intersection of events A and B contains exactly 3 observations, how many observations are in the union of these two events? A. 0 B. 10 C. 22 D. 28
Found 2 solutions by sudhanshu_kmr, ewatrrr:
Answer by sudhanshu_kmr(1152) (Show Source): You can put this solution on YOUR website!

C 22

Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

Hi,
event A contains 10 observations and event B contains 15 observations.
intersection of events A and B contains exactly 3
how many observations are in the union of these two events:
P(A ∪ B) = P(A) + P(B) - P(A ∩ B) = 10 + 15 - 3 = 22
RELATED QUESTIONS
A quantitative variable contains 10 observations that have a mean value of 25. One of the (answered by stanbon)
A mathematics class contains 26 students. Of these, 14 are economics majors, 15 are... (answered by edjones)
A quantitative variable contains 10 observations that have a standard deviation of 10.... (answered by stanbon)
An urn contains 3 red balls, 2 white balls and 1 blue ball. Two balls are drawn without... (answered by ikleyn,robertb)
An urn contains 5 red and 7 blue balls. Suppose that two balls are selected randomly and... (answered by Theo)
Two dice are thrown let A be the event that the sum of upper face number is odd and B the (answered by greenestamps)
In each of the 118 independent observations, the event can occur with a probability of... (answered by ikleyn)
If A and B are independent events, show that A and B' are also independent events, where... (answered by Edwin McCravy)
1.Events A and B are independent if: ( A. event A occurs, therefore event B cannot... (answered by lynnlo)