Evaluation on Combination

How do you call the selection of objects from a set?

• permutation

• combination

• probability

• differentiation

How many polygons can be formed with five points and no three of which are collinear?

• 16

• 20

• 32

• 50

If C(n,5) = 56, what is n?

• 6

• 7

• 8

• 9

In how many ways can 8 friends form a team of 3 members?

• 24

• 56

• 336

• 1680

Which of the following formulas gives the number of combinations of n objects taken r at a   time.

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There are 7 books on a shelf. In how many ways can you select 4 books?

• 11

• 28

• 35

• 840

If C(n,r) = 35, which of the following are possible values of n and r?

• n=6, r=4

• n=7, r=3

• n=8, r=3

• n=9, r=2

What is the value of r in C(5,r)=1?

• 1

• 3

• 4

• 5

Is the condition of selecting first 5 players for the first quarter of a basketball game a problem on combination or permutation?

• combination

• permutation

• probability

• differentiation

In a group of 10 students, there are 6 males and 4 females. How many ways can a committee of 3 males and 2 females be formed?

• 1

• 6

• 20

• 120