Question # 1

The positive square root of mean of the squared deviations of x_i(i=1, 2---------------------,n) observations from their arithmetic mean is called:

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Harmonic mean

Range

Standard deviation

Sec 30^o = .....................

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1/2

√3/2

2

2/√3

If A and B are two disjoint sets then A⋃ b = ______

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A

B

∅

B⋃ A

The length of a chord and the radial segment of a circle are congruent, the central angle made by the chord will be:

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30°

45°

60°

75°

Synthetic division is simply a short cut of:

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H.C.F

L.C.M

Long division method

Factorization

In a ratio a:b, a is called:

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Relation

Antecedent

Consequent

None of these

Product of the roots of the equation 3x²-5x+7=0:

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3⁷

7³

Factors of x²-x-2=0 are:

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(x-1)(x+2)

(x-1)(x-2)

(x+1)(x+2)

A single fraction which is the simplified from of two or more than two fractions is called:

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Proper fraction

Improper fraction

Rational fraction

Resultant fraction

A line which has only one point in common whit a circle is called:

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chord

secant

tangent

sector

The system of measurement in which the angle is measured in radian is called.

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CGS system

Sexagesimal system

Circular system

MSK sytem

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An improper fraction

An equation

A proper fraction

None of these

In a cumulative frequency Polygon frequencies are plotted against:

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Mid points

Upper class boundries

Class limits

Product of roots of equation 5x²+3x-9=0:

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If number of elements in set, A is 3 and in set B is 2 then number of binary relations in A x B is:

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2³

2⁶

2⁸

2²

The distance between the centres of two congruent touching circles externally is:

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Of zero length

The radius of each circle

The diameter of each circle

Twice the diameter of each circle

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