Question

The probability guessing the correct answer to certain questions is p/2 . If the probability of not guessing the correct answer to same question is 3/4 then find value of p.

Answer 1

probability of not guessing correct answer=1-p/2=2-p/2

given value is 3/4

so, 2-p/2=3/4

8-4p=6

2=4p

p=2/4=1/2

Answer 2

Answer:

p= 1/2

Step-by-step explanation:

p(of event occuring) + p(of event not occuring) = 1

so,

p/2 + 3/4 = 1

2p + 3/4 = 1

2p + 3 = 4

2p = 1

p = 1/2