Question # 1

Formula of variance is group data is:

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If R= { (a,2),(b,3),(c,3) }, then Dom R = ________________

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{1,2}

{1,2,3}

{a,b,c}

{a,c}

The relation R = {(1,2),(2,3),(3,3),(3,4)} IS:

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Not a function

Onto function

One-One function

Into function

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

(A∩B)'= _____________

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A'∪B'

A'∩B'

A∩B

A∪B

The Range of R

={(1,3),(2,2),(3,1)(4,4)} is.

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{1,2,4}

{3,2,4}

{1,2,3,4}

{1,3,4}

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

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3.7

7.3

6.7

no harmonic mean

U' = ________________

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U

A

A'

φ

A set with no element is called:

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Subset

Empty set

Singleton set

Super set

If A has two elements and B has 3 elements, then number of binary relations in A x B is __________

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2 x 3

2³

2⁶

2²

If R ={(0,2),(2,3),(3,4)} then Dom (R) is:

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{0,3,4}

{0,2,3}

{0,2,4}

{2,3,4}

Coding formula of group data of the arithmetic mean is:

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X̅ = ∑fX/∑f

X̅ = ∑fD/∑f

X̅ = A + ∑fu/∑f x h

X̅ = A + ∑fu/∑f

The domain of R = {(0, 2), (2, 3), (3, 3), (3, 4)} is:

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{0, 3, 4}

{0, 2, 3}

{0, 2, 4}

{2, 3, 4}

Formula to determine the size of a class is:

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X_max - X_min

X_max + X_min

Range/number of groups

number of groups/Range

A'=_____________

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{x|x∈U^x∉A}

{x|x∈U^x∈A}

{x|x∉U^x∈A}

{x|x∉U^x∉A}

A∩ A^c= ...........................

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∪

A^c

∅

A

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