What is the probability of having an even number in a single toss of a fair die?
1/6
1/3
1/2
2/3
5/6
Correct answer is C
Prob(even number in single toss) = \(\frac{3}{6}\)
= \(\frac{1}{2}\)
A fair die is rolled once. What is the probability of obtaining a number less than 3?
1/6
1/3
2/3
1/2
5/6
Correct answer is B
Prob(less than 3) = \(\frac{2}{6}\)
= \(\frac{1}{3}\)
2/11
5/11
6/11
9/11
2/3
Correct answer is A
S = {20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30}
n(S) = 11
P = {23, 29}
n(P) = 2
Prob(P) = \(\frac{2}{11}\)
How many students scored less than 7 marks?
9
15
18
21
25
Correct answer is B
= 2 + 4 + 3 + 6
= 15 students scored less than 7 marks.
How many student took the examination
18
20
21
23
24
Correct answer is E
= 2 + 4 + 3 + 6 + 6 + 2 + 1
= 24 students
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Aptitude Tests