Question

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Question No 21
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Muluple Choice ( Select 1 out of 4 options, for the question below)
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A system of equations AX-B is said to be homogeneous if
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Options
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O B is a zero matrix
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O B is a non-zero matrix
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O B is an identity matrix
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O None of these
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Clear Response
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Answer 1

Answer:

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Answer 2

Answer:

Let probability of getting a correct answer is P(A).

Here, P(A)=13

∴P(A¯¯¯)=1−13=23

Here, P(A¯¯¯) is the probability of getting an incorrect answer.

Now, there are two cases when a candidate can answer four or more answers correctly.

Case 1: When he answers 4 questions correcly and one incorrect.

In this case, probability will be =C(5,4)(13)4(23)=5⋅181⋅13=10243

Case 2: When he answers all 5 questions correcly .

In this case, probability will be =C(5,5)(13)5=1⋅1243=1243

∴ Required probaility =10243+1243=11243.

Explanation: