Question

If E be an event such that P(E) = 3/7 , what is P(not E) equal to ?

Answer 1

Answer:

P(E)=3/7

P(not E)=1-3/7

=7-3 /7

=4/7 sol

Hope it will help...!!

Answer 2

P(not E) is equal to 4/7.

Given - P(E)

Find - P(not E)

Solution - As we know, sum of the probability of occurence of an event and probability of not occurence of an event is 1.

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

P(not E) = 1 - 3/7

Taking LCM we get 7

P(not E) = $\frac{(1 \times 7) - 3}{7}$

P(not E) = $\frac{7 - 3}{7}$

P(not E) = $\frac{4}{7}$

Hence, P(not E) is 4/7.

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