Elitmus
Exam
Numerical Ability
Probability
IF A PROFESSOR ANSWER CORRECT ONE IF HE ATTEMPT AVERAGE 4 QUESTIONS THE WHAT IS THE PROBABILITY IF HE ATTEMPTS 4 QUESTIONS
Read Solution (Total 3)
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- probability for each correct attempt=1/4
for wrong=3/4
so probability for atleast one correct attempt out of 4 chance=1-3*3*3*3/256 - 11 years agoHelpfull: Yes(11) No(2)
- probability for at least one correct attempt = 1-probability of all wrong attempts
=1-3/4*3/4*3/4*3/4 - 11 years agoHelpfull: Yes(8) No(0)
- probability of answering ! question correct out of four attempts is 1/4
- 11 years agoHelpfull: Yes(1) No(5)
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