In a multiple choice question there are four alternative answers, of which one or more are correct. a candidate will get marks in the question only if he ticks all the correct answers. The candidate decides to tick the answers at random. if the is allowed upto 3 chances to answer the question, find the probability that he will get marks in the question.
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1 Answers
383The possible answers are
a, b, c, d, ab, ac, ad, bc, bd, cd, abc, abd, acd, bcd, abcd
total no of possible ans=15
probability=3/5=15
- Soumyabrata Mondal *3/15Upvote·0· Reply ·2013-03-06 08:16:45
Sourup Nag U dont multiply it by 3 as he makes 3 choices. Think on this part a bit more friend.... although the answer will be 1/5
- Soumyabrata Mondal IITJEE-1985
- Soumyabrata Mondal NO