Question

If the probability of guessing correct answer is x/y
And probability of not Guessing correct answer is 4/5 then find the value of x
(HINT: x/y+4/5=1)

Answer 1

Step-by-step explanation:

x/y+4/5=1

x/y=1--4/5

x/y=1/5

.:. x=1

Answer 2

Step-by-step explanation:

Value of x will be 1.

We have given that the probability of guessing correct answer is x/y

And probability of not Guessing correct answer is 4/5.

P(Correct) = x/y

P(Incorrect) = 4/5

Here, We know that a probability formula that is P(Incorrect) = 1 - P(Correct)

Putting given values in Formula, We have:

P(Incorrect) = 1 - P(Correct)

4/5 = 1 - x/y

4/5 +x/y = 1

5-4/5 =x/y

1/5 = x/y

So, Value of x will be 1. (Using Equality