Answers

2014-08-25T18:07:18+05:30
Total no of questions=5 Possible answers=20 (5×4) Total correct answers=5 (as there is only one ans correct in each ques) So the probability of getting at least 3 ans correct will be= 3/20 : )
2 3 2
Yes....which is better.....although both r the exact same....
its wrong....sry
How is it wrong ?can u pls give the correct ans....
i too dont knw! :(
Here is the answer.....5c3*(1/4)^3 * (3/4)^2 + 5c4*(1/4)^4 * (3/4) +5c5 *(1/4)^5 =53/512...........
2014-08-25T18:16:47+05:30
No. of MCQ questions = 5
No. of correct answer in 1 MCQ question = 1 out of 4 options
No. of possible answers total = 5 * 4 = 20
No. of total correct answers = 5/20
Probability of getting 3 answers correct is 3/20
2 3 2
if u find it useful please mark as best
no.......wrng answer
how?
its a question asked in interview! i remember only the denominator values...its like 512 for 3 options and 256 for a single option
Here is the answer.....5c3*(1/4)^3 * (3/4)^2 + 5c4*(1/4)^4 * (3/4) +5c5 *(1/4)^5 =53/512