Have an account?
The probability of getting a black card from a well shuffled deck of 52 cards is:
The probability of getting less than 3 in a single throw of a die is:
Which of the following can be the probability of an event?
The survey has 1000 American adults being selected randomly. After blood tests, the result was 125 people with blood type A, the rest were other blood types. What is odds in favor of blood type A?
The school's excellent student team has 20 students, located in two classes: Class A and Class B. Class A has 25 students, Class B has 30 students. If you select one student randomly in each class, what is the probability that both two students are on this team?
In a chess set, there are 4 "royal" pieces, 2 kings and 2 queens. If a chess piece is selected randomly from the box, what is the probability of selecting a piece that is NOT of "royal"?
The example of an equip-probable sample space: A sample space of:
Tossing a dice
Selecting even numbers from 1-9.
Buying a defecting watch in the store.
Getting 3 heads from flipping 3 coins at the same time.
Probability of the event is equal 1 when:
This event is 50% to occur.
This event is 70% to occur.
This event is 20% to occur.
This event is 100% to occur.
The unusual event is the event whose probability to occur is:
P < 10%
P < 15%
P < 5%
P < 20%
The formula to compute the probability of two not-disjoint events (or any two events) is:
P(E or F) = P(E) x P(F)
P(E or F) = P(E) + P(F)
P(E or F) = P(E) + P(F) – P(E and F)
P(E or F) = P(E and F) – 1