Question

the probability of guessing the correct answer to a certain question is x/3. if the probability of not guessing the correct answer is 5x/3, then find the value of x.

Answer 1

Hi friend ,

P( guessing the correct ans)+P( not guessing the correct ans) = 1

x/3 +5x/3 = 1

x +5x/3 = 1

6x /3 = 1

6x = 3

x = 3/6

x = 1/2

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Answer 2

Hi there !!

Probability of guessing correct answer = x/3

Probability of not guessing the correct answer = 5x/3


We know that sum of probability = 1

SO ,

x/3+5x/3 = 1

[x + 5x] /3 = 1

6x/3 = 1

6x = 3

x = 3/6

x = 1/2