Question

 If P(E)= 0.25 what is the value of P(not E) ?​

Answer 1

Step-by-step explanation:

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P(E)+p(E)'=1

0.25+p(E)'=1

p(E)'=0.75

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Answer 2

If P(E) = 0.25 then P(not E) = 0.75

Given :

P(E) = 0.25

To find :

The value of P(not E)

Solution :

Step 1 of 2 :

Write down the given probability

Here it is given that for the event E

P(E) = 0.25

Step 2 of 2 :

Find the value of P(not E)

We know that for any event E ,

P(E) + P(not E) = 1

In order words P(E) + P(E') = 1

Thus we get

P(E) + P(not E) = 1

⇒ 0.25 + P(not E) = 1

⇒ P(not E) = 1 - 0.25

⇒ P(not E) = 0.75

Hence the value of P(not E) = 0.75

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