Aptitude Questions and Answers for PLACEMENTS

Ques. An unbiased dice is rolled 3 times. The probability that the value on the dice is not more than 4 in any of the 3 rolls is:
Op 1: 8/27
Op 2: 1/27
Op 3: 26/27
Op 4: 2/3
Op 5:
Correct Op : 1


Ques. Probability of occurrence of event A is 0.5 and that of event B is 0.2. The probability of occurrence of both A and B is 0.1. What is the probability that none of A and B occur?
Op 1: 0.3
Op 2: 0.4
Op 3: 0.7
Op 4: None of these
Op 5:
Correct Op : 2


Ques. An unbiased coin is tossed 5 times. If tail appears on first four tosses, then probability of tail appearing on the fifth toss is:
Op 1: 1/2
Op 2: 1
Op 3: 0
Op 4: 4/5
Op 5:
Correct Op : 1