Permutation and Combination

The word "arrange" usually refers to

• Permutation
• Combination
• Probability
• Counting

Tags

CCSS.HSS.CP.B.9

The word "selection" usually refers to

• Combination
• Permutation
• Probability
• Counting

Tags

CCSS.HSS.CP.B.9

Multiplication rule applies when

• Apply counting using sequential steps
• Apply counting through cases
• All the time
• I don't know

Addition rule applies when

• Apply counting using sequential steps
• Apply counting through cases
• All the time
• I don't know

Permutation is the situation when

• A different result occurs when positions of objects are switched
• The same result occurs when positions of objects are switched
• counting principles are applied
• I don't know

Tags

CCSS.HSS.CP.B.9

Combination is the situation when

• A different result occurs when positions of objects are switched
• The same result occurs when positions of objects are switched
• counting principles are applied
• I don't know

When do we use the formula "nPr"?

• Permutation. All objects distinct
• Permutation. Some identical objects
• Arranging people in a row
• Forming a group of r objects

When do we use the formula "n!/(a!*b!*...)"?

• Permutation. All objects distinct
• Permutation. Some identical objects
• Arranging people in a row
• Forming a group of r objects

Suppose I have the alphabets "A,A,B,B,B,C,D,D,E". When applying "nCr", n = ____ ?

• 5
• 9
• 3
• 7

When do we use "slot-in" method?

• When some items are to be separated.
• When some items cannot be all together
• Permutation
• Combination