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- Q1
When does the union of two events occur?
Neither event A and event B occur
Event A and event B are mutually exclusive
Both event A and event B occur
Either event A or event B occurs
30sM10SP-IIIg-1 - Q2
What do you call the collection of all outcomes that is an element of one or the other of the sets A and B, or both of them?
Condition
Union
Intersection
Complement
30sM10SP-IIIg-1 - Q3
In the formula for finding the probability of a union of two events: P( A U B) = P(A) + P(B) – P(A ∩ B), why is P(A ∩ B) subtracted from P(A) + P(B)?
There is no explanation other than it’s just a part of the rule.
Either A or C
This rule determines the probability of event A or B occurring, not A and B, so this factor is subtracted.
P(A ∩ B) has been counted twice through P(A) and P(B).
30sM10SP-IIIg-1 - Q4
From a deck of 52 cards, what is the probability of drawing a number card or a spade?
49
40
30sM10SP-IIIg-1 - Q5
Two dice are tossed at the same time, what is the probability of getting a sum greater than 10?
3
30sM10SP-IIIg-1 - Q6
Fifteen balls in a jar are numbered from 1 to 15. A ball is drawn at random. What is the probability that the number on the ball is less than 6 or even.
30sM10SP-IIIg-1 - Q7
What is P(A∩B) if P(A) = 0.65, P(B) = 0.30 and P(A∪B) = 0.75?
0.30
0.15
0.65
0.20
30sM10SP-IIIg-1 - Q8
Mang Pepito has a farm with chickens and pigs. 27% are chickens and 39% are pigs. What is the probability that an animal chosen in random is either a chicken or a pig?
0.73
0.12
0.39
0.66
30sM10SP-IIIg-1 - Q9
In a class of 29 students, 15 like Science and 21 like Math. They all like at least 1 of the two subjects. What is the probability that a student chosen in random likes Math or Science?
1
30sM10SP-IIIg-1 - Q10
The result of a survey about student’s favorite tv network is shown below. What is the probability of getting a male student or student whose favorite is Network 2?
30sM10SP-IIIg-1