Question

If A be the event such that P(A) = 2/5, then P(not A) is equal to


(A)3/5
(B)4/5
(D) None​

Answer 1

Answer:

(A) 3/5 is the answer

Step-by-step explanation:

Let S be the sample space

n(S)= 5

Let A be the sample space for event A

n(A) = 2

P(A)=n(A)/n(S)

=2/5

Let B be the sample space for event not having A

n(B)=5-2

n(B) = 3

P(B) = n(B) / n(S)

3/5

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Answer 2

Answer:

HEY THERE !!

Step-by-step explanation:

We have a rule or just a general fact that,

Sum of probabilities must be one for a particular event.

P(A) + P(not A)=1

where P is the probability and A is the event.

As per the question,

2/5 + P(not A) = 1

P(not A) = 1-(2/5)

P(not A)=3/5