Question # 1

If number of elements in set A is 3 and in set B is 4 then number of elements in AxB is:

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3

4

12

7

A∩ A^c= ...........................

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∪

A^c

∅

A

if A and B are disjoint sets , then A∪ B is equal to.

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A

B

∅

B∪ A

If x⊆ A and x∉ b, then { x } is equal to.............

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A - B

B - A

A∩ B

A^c

Sum of the deviations of values x from its mean is always ''i.e ∑(x-x̅)’is to equal:

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itself

zero

median

mode

The number of elements in the power set of {1,2,3,4}.

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4

8

16

0

If { x|x=p/q, q≠0,p,q∈Z} then this is a _____________

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Set of even numbers

Set of rational number

Set of irraional numbers

Set of integers

(A⋃B)⋃C = ________

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A ⋂ (B⋃C)

(A⋃B)⋂C

A⋃ (B⋃C)

A⋂(B⋂C)

Venn diagram was first used by......................

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John Venn

Netwon

Arthur Cayler

John Napier

The domain of {(a,b),(b,c),(c,d)} is............

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{a,b,c}

{b,c,d}

{a,b}

{a,b,c,d}

If A is subset of U, then (A^c)^c= .........

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A

A^c

U^c

∅

If B={1,2,100} and C = {2,100}, then B∩C = ________

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{1,2}

{1,2,100}

{2}

{2,1}

The formula of grouped data of the arithmetic mean is:

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X̅ = ∑X/n

X̅ = A + ∑fX/∑X

X̅ = ∑fX/n

X̅ = l +n/f (n/2 - c)

The harmonic mean of the observation 0,15,12, is:

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3.7

7.3

6.7

no harmonic mean

The formula of group data of the median is:

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l + h/f (n/2 -c)

l +∑fx/∑f x n,

l + f_m- f₁/2f_m - f₁ - f₂ x n,

A + ∑fu/∑f x n

The date presented in the form of frequency distribution is called:

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distribution

grouped data

range data

regrouped data

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