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Math 11 Chapter 7
Permutation, Combination and Probability
Test - 6
1.
When a fair die is rolled, the probability for the occurrence of a number greater than 4 is ___________.
a) 1/5
b) 1/4
c) 1/2
d) 1/3
2.
A bag contains 40 balls out of which 5are green and 15 are black. A ball is taken out of the bag. The probability that the ball is not green is __________.
a) 7/8
b) 3/5
c) 5/8
d) 5/7
3.
If A and B are overlapping sets then: P(AUB) = __________.
a) P(A)+P(B) - P(AUB)
b) P(A)+P(B) - B(AUP)
c) P(A)-P(B) - P(AUB)
d) P(A)+B(P) - P(AUB)
4.
The probability of getting 2 heads in two successive tosses of a balanced coin is __________.
a) 1/3
b) 1/6
c) 1/4
d) 1/8
5.
When the sum of dots appearing in two successive throws of two dice is 7, the probability is ________.
a) 1/8
b) 1/7
c) 1/6
d) 1/4
6.
9! / 2!(9-2)!
a) 22
b) 36
c) 24
d) 28
7.
(n+2)! / (n-1)!
a) n(n+1) (n +4)
b) n(n+1) (n +2)
c) n(n+2) (n +2)
d) n(n+1) (n - 2)
8.
n
P
2
=30
a) n=5
b) n=6
c) n=4
d) n=8
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