Permutation & Combination 1

What do you call the different arrangements of the objects of a group?

• Selection

• Differentiation

• Permutation

• Combination

Which situation illustrates permutation?

• forming a committee of councilors

• selecting 10 questions to answer out of 15 questions in a test

• choosing 2 Mathematics books to buy from a variety of choices

• assigning rooms to conference participants

It is the selection of objects from a set.

• Combination

• Differentiation

• Permutation

• Distinction

Which of the following situations illustrates combination?

• arranging books in a shelf

• drawing names from a box containing 200 names

• forming different numbers from 5 given digits

• forming plate numbers of vehicles

Which of the following situations does not illustrate combination?

• selecting fruits to make a salad

• assigning telephone numbers to homes

• choosing household chores to do after classes

• selecting posters to hang in the walls of your room

Which of the following expressions represents the number of distinguishable permutations of the letters of the word CONCLUSIONS?

• 11!

A certain restaurant allows you to assemble your own vegetable salad. If there are 8 kinds of vegetables available, how many variations of the salad can you make containing at least 5 vegetables?

• 56

• 84

• 93

• 96

Calculate P (12, 4)

• 40,320

• 11,880

• 990

• 495

How many different 3-digit numbers can be formed from the digits 1, 3, 4, 6, 7, 9 if repetition of digits is not allowed?

• 840

• 720

• 360

• 120

If P (9, r) = 504, what is r?

• 7

• 6

• 5

• 3