Question:

Two matrices A and B are multiplied to get AB if

A.

both are rectangular

B.

both have same order

C.

no of columns of a is equal to columns of b

D.

no of rows of a is equal to no of columns of b

Answer» d. no of rows of a is equal to no of columns of b

Question:

In 15/4 – 7x = 9, x=

A.

4/3

B.

¾

C.

-4/3

D.

-3/4

Answer» d. -3/4

Question:

A ∪ (B∪ C) = (A ∪ B )∪C and A ∩ (B∩C)= (A ∩ B) ∩C is known as

A.

de morgan’s law

B.

distributive law

C.

associative law

D.

commutative law

Answer» c. associative law

Question:

If A is a 3 × 2 matrix, B is a 2 × 3 matrix, C is a 2 × 2 matrix and D is a 3 × 3 matrix, thenwhich of the following products does not exist?

A.

ab

B.

ac

C.

bd

D.

cd

Answer» d. cd

Question:

The values of x satisfying the equations is given by 3x+2=x+6

A.

4

B.

8

C.

2

D.

-2

Answer» c. 2

Question:

A ∪ (B ∩C) = (A ∪ B ) ∩(A∪C)A ∩ (B∪C)= (A ∩ B) ∪(A∩C) is known as

A.

de morgan’s law

B.

distributive law

C.

associative law

D.

commutative law

Answer» b. distributive law

Question:

What is the order of a matrix?

A.

number of rows x number of columns

B.

number of columns x number of rows

C.

number of rows x number of rows

D.

number of columns x number of columns

Answer» a. number of rows x number of columns

Question:

The general quadratic equation ax2 +bx +c=0 can be solved by using

A.

by factorization method

B.

by quadratic formula

C.

by completing the square method

D.

all the above

Answer» d. all the above

Question:

If all the elements of any row or column are zero, the determinant is zero.

A.

unity

B.

positive

C.

negative

D.

zero

Answer» d. zero

Question:

Two sets A and B are said to be …………………. sets if no element of A is in B and noelement of B is in A.

A.

universal

B.

disjoint

C.

equivalent

D.

none of these

Answer» b. disjoint