Math 11 Chapter 7Permutation, Combination and ProbabilityTest - 3

Math 11 Chapter 7
Permutation, Combination and Probability
Test - 3

1. If A and B are two independent events, the probability that both of them occur is P(A) + P(B).

a) False
b) True

2. Probability of getting king from a pack of 52 cards is 1/4.

a) False
b) True

3. Factorial form of (n+1) (n) (n-1) is

a) (n-1)! / (n-2)!
b) (n+1)! / (n-2)!
c) n! / (n-2)!
d) (n²-1)! / (n-2)!

4. Value of is 15! / 15!(15-15)! is

a) 0
b) 1/0
c) 15
d) 1

5. ⁹P₂ is equal to:

a) 9
b) 9/8
c) 91
d) 72

6. If ⁿP₁= 30 then value of n is:

a) 30
b) 6
c) -6
d) -5

7. The number of permutations that can be formed from the letters of the word OBJECT is:

a) 720
b) 620
c) 600
d) 700

8. ⁿC_n-r is equal to:

a) ^n-1C_r
b) ^rC_n
c) ^rC_r
d) ⁿC_r

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