CBSE Class 10 Answered
prob. of guessing the correct ans. is x/12. if prob of not guessing the correct ans is 2/3 . find x.
Asked by | 23 May, 2009, 12:16: PM
Expert Answer
Let E be the event of guessing the correct answer and E' be the event of not guessing the correct answer
Prob. of guessing the correct ans. is x/12
P(E) = x/12
P(E') = 2/3 = 1- x/12
x/12 = 1-2/3 = 1/3
x = 4
Answered by | 23 May, 2009, 12:28: PM
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