Session 7

What type of matrix is this?

(Choose all that applies)

• Diagonal matrix

• Upper triangular

• Lower triangular

• Symmetrical

What type of matrix is this?

(Choose all that applies):

• Diagonal matrix

• Upper triangular matrix

• Square matrix
• Identity matrix

What type of matrix is this:
(choose all that applies)

• Diagonal matrix

• Lower triangular matrix

• Square matrix

• Symmetric matrix
• Rectangular Matrix

To perform multiplication between two 3X3 matrices, how many basic operations (addition, multiplication, etc.) do you need to perform?

• 9

• 27

• 45

• 54

• A+B

• A+B+C

• C

• none of the above

• A+B

• C

• A+B-C

• U-D

• U-C

Answer explanation

Looking at this Venn diagram, which areas represent A\B?

• A-C

• C

• D-B

• U-B-C

• C+D

• D

• U

• U-D

• B+C

• B+D-C

• B+D

• U-A

There are 100 students enrolled in MAS162 this semester, and this unit's overall fail rate is 40%. The PASS session attendance rate is 20%, and the fail rate of PASS session attendees was 10%.

How many people attend PASS sessions?

PS: the next few questions have the exact same context, so no need to re-read it too much.

PPS: this question has 3 minutes for everyone to read it, but the next few questions will have less time frame.

• 10

• 20

• 40

• 80