Let's use Gaussian elimination. Consider the augmented matrix,
• Add row 1 to row 2, and add -1 (row 1) to row 3:
• Add -2 (row 2) to row 3:
• Add -2 (row 3) to row 2:
• Add row 2 and row 3 to row 1:
So the inverse is
M Give one reason why banks charge people banking fees.
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Answer :
<h3>Step-by-step explanation:
Given that a multiple-choice test contains 10 questions and there are 4 possible answers for each question.
∴ Answers=4 options for each question.
<h3>To find how many ways a student can answer the given questions on the test if the student answers every question :</h3>Solving this by product rule
Product rule :
<u>If one event can occur in m ways and a second event occur in n ways, the number of ways of two events can occur in sequence is then m.n</u>
From the given the event of choosing the answer of each question having 4 options is given by
The 1st event of picking the answer of the 1st question=4 ,
2nd event of picking the answer of the 2nd question=4 ,
3rd event of picking the answer of the 3rd question=4
,....,
10th event of picking the answer of the 10th question=4.
It can be written as by using the product rule