Cho tập hợp A= { x= n² + 2 + 7 / n thuộc Z, -2 < n ≤ 3 } . Hãy viết tập hơp
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<u>Answer: </u>
The probability of rolling a number greater than 4 or less than 3 is
<u>Solution: </u>
In the given question there are two events as follows:
(a) Rolling a number greater than 4 i.e. A = {5,6}
(b) Rolling a number less than 3 i.e. B = {1,2}
Since a die has 6 numbers,
P(A) = where P(A) is the probability of occurrence of event A and P(B) =
Since, Event A and Event B has nothing in common therefore they are mutually exclusive events.
P(A∪B) = P(A) + P(B)
Therefore the probability of getting a number greater than 4 or less than 3 is