Question

The probability of guessing the correct
answer to certain test question is x/2
. If the probability of not guessing the correct answer to this question is
2/3, then find the value of x.​

Answer 1

Answer:

1-x/2.

2-x/2.

2-x/2=2/3.

2-x=4/3.

-x=4/3-2.

-x=0/3.

x=0.

Answer 2

Explanation:

Answered 8 months ago

P(c) = x/12

P(c') = 2/3

We know that sum of the probability of an event happening and not happening is 1.

Hence, P(c) + P(c') = 1 or

x/12 + 2/3 = 1

x/12 = 1 - 2/3

x/12 = 1/3

3x = 12

x = 12/3

x = 4

hope it will help you ✌