The probability of guessing the correct answer to a certain test questions is `x/(12)` If the probability of not guessing the correct answer to this question is `2/3` then x = (a)2 (b) 3 (c) 4 (d) 6

The probability of guessing atleast 8 correct answers out of 10 true /false questions

If x/2-4=x/3-1, then x= (a)3 (b) 6 (c)18 (d) 2

Find the probability of guessing at least 6 out of 10 answers in True false type examination

If x/6+x/4=x/2+3/4, then x= (a) 9 (b) 6 (c) -9 (d) 4

If (x-2)/3=(2x-1)/3-1, then x= (a) 2 (b) 4 (c) 6 (d) 8

If (2^3)^2=4^x ,\ then 3^x= (a)3 (b) 6 (c) 9 (d) 27

Find the probability of guessing correctly atleast 6 out of 10 questions in (i) True or false type examination (ii) multiple choice with 4 possible answers.

Choose the correct option 5/4-7/6-(-2)/3=\ (a) 3/4 (b) -3/4 (c) (-7)/(12) (d) 7/(12)

In an entrance test, there are multiple choice questions. There are four possible answers to each question, of which one is correct. The probability that a student knows the answer to a question is 90%. If the gets the correct answer to a question, then find the probability that he was guessing.

In an entrance test, there are multiple choice questions. There are four possible answers to each question, of which one is correct. The probability that a student knows the answer to a question is 90%. If the gets the correct answer to a question, then find the probability that he was guessing.