the probability of guessing the correct answer to a certain question is x/2. If the probabilityof not guessing the correct answer to the question is 2/3, then find x
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Answered by
42
The sum of all the probabilities is equal to 1
So, x/2 = 1 - 2/3
x/2 = 1/3
x = 2/3
So, x/2 = 1 - 2/3
x/2 = 1/3
x = 2/3
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Answered by
16
We have p(A)+p(A`)=1
given p(A)=x/2
and p(A`)=2/3
x/2+2/3=1
x=2/3
given p(A)=x/2
and p(A`)=2/3
x/2+2/3=1
x=2/3
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