Question

the probability of guessing the correct answer is X/2. if the probability of guessing the incorrect answer is 2/3, then find the value of X.

Answer 1

The probability of guessing the correct answer to a certain question = x/2.
→The probability of not guessing the correct answer =1−x/2
1−x/2= 2/3.
→x/2=1−2/3=1/3
Hence x= 2/3

Answer 2

Given:

Probability of guessing the correct answer = x/2

Probability of guessing wrong answer = 2/3

To Find:

Value of x

Solution:

In the question,

Probability of guessing the correct answer = x / 2

and probability of not guessing the correct answer = 2 / 3

Equation both -

Thus, x / 2 + 2 / 3 = 1

= 3x + 4 = 6

= 3x = 6 - 4

= 3x = 2

= x = 2 / 3

Answer: The value of x is 2/3.