# MCQs Probability – 3

This Quiz contains Online MCQS Probability, events, experiments, mutually exclusive events, collectively exhaustive events, sure events, impossible events, addition and multiplication laws of probability, etc. Let us start MCQs Probability with Answers:

1. If $P(A) =0.80$, $P(B)=0.65$, and $P(A\cup B) = 0.78$, then $P(B|A) =$?

2. Events $A$ and $B$ are mutually exclusive with $P(A)=0.3$ and $P(B) = 0.2$. The probability of the complement of Event $B$ equals

3. The probability of rain tomorrow is 40%. What is the probability of the complement of this event?

4. _____ probability is the updated probability of an event based on new data.

5. If $A$ and $B$ are independent events with $P(A)=0.38$ and $P(B)=0.55$, then $P(A|B)=$?

6. Two events are _____ if the occurrence of one event does not change the probability of the other event.

7. In an experiment, events $A$ and $B$ are mutually exclusive, if $P(A)=0.6$, then the probability of $B$

8. In statistics, a number between _____ is used to express the probability that an event will occur.

9. What is the probability that a ball is drawn at random from a jar?

10. Which of the following statements is(are) always true?

11. What is conditional probability?

12. One of the basic requirements of probability is

13. Two events are _____ if the occurrence of one event changes the probability of the other event.

14. Suppose two events occur: The first event is drawing an ace from a standard deck of playing cards, and the second event is drawing another ace from the same deck. Note that the first ace is not reinserted into the deck after it is drawn. What term is used to describe these two events?

15. What does Bayes’s theorem enable data professionals to calculate?

16. A jar contains four marbles: Two marbles are red, one is green, and one is blue. One marble is taken from the jar. What is the probability that the marble is blue?

17. If two events are independent, then

18. If $X$ and $Y$ are mutually exclusive events with $P(X) = 0.295, P(Y) = 0.32$, then $P(X|Y)=$?

19. The multiplication law is potentially helpful when we are interested in computing the probability of

20. If $A$ and $B$ are mutually exclusive events with $P(A) = 0.3$ and $P(B) = 0.5$, then $P(A \cup B) =?$

### Online MCQs Probability Quiz

• If $A$ and $B$ are mutually exclusive events with $P(A) = 0.3$ and $P(B) = 0.5$, then $P(A \cup B) =?$
• In an experiment, events $A$ and $B$ are mutually exclusive, if $P(A)=0.6$, then the probability of $B$
• Which of the following statements is(are) always true?
• One of the basic requirements of probability is
• Events $A$ and $B$ are mutually exclusive with $P(A)=0.3$ and $P(B) = 0.2$. The probability of the complement of Event $B$ equals
• The multiplication law is potentially helpful when we are interested in computing the probability of
• If $P(A) =0.80$, $P(B)=0.65$, and $P(A\cup B) = 0.78$, then $P(B|A) =$?
• If two events are independent, then
• If $A$ and $B$ are independent events with $P(A)=0.38$ and $P(B)=0.55$, then $P(A|B)=$?
• If $X$ and $Y$ are mutually exclusive events with $P(X) = 0.295, P(Y) = 0.32$, then $P(X|Y)=$?
• What is the probability that a ball is drawn at random from a jar?
• In statistics, a number between _ is used to express the probability that an event will occur. Two events are if the occurrence of one event changes the probability of the other event.
• What does Bayes’s theorem enable data professionals to calculate?
• What is conditional probability?
• Suppose two events occur: The first event is drawing an ace from a standard deck of playing cards, and the second event is drawing another ace from the same deck. Note that the first ace is not reinserted into the deck after it is drawn. What term is used to describe these two events?
• probability is the updated probability of an event based on new data.
• The probability of rain tomorrow is 40%. What is the probability of the complement of this event?
• Two events are ___________ if the occurrence of one event does not change the probability of the other event.
• A jar contains four marbles: Two marbles are red, one is green, and one is blue. One marble is taken from the jar. What is the probability that the marble is blue?

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