Question # 1

The mean of the squared deviations of x1,(i = 1,2.........,n) observations from their arithmetic mean is called.....................

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Variance

Standard deviation

Range

Mode

If a = -2, b = -1 and c = -1, then discriminant is equal to:

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17

-17

-7

7

The length of a tangent to a circle is from the given point to the point of:

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start point

enc points

contact

collinear

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2

1

Sec 270° =

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0

1

-1

Not defined

If Tanθ=1 then Sinθ= ____________ whenθ lies in 3rd quadrant.

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1/2

-1/2

-1/√2

1/√2

One and only one circle can be drawn through _______ non-collinear collinear points:

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One

Two

Three

Four

If tanθ =√3 thenθ is equal to .

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30^o

45^o

60^o

90^o

In a ratio a:b, a is called:

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Relation

Antecedent

Consequent

None of these

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

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Proper fraction

Rational fraction

Improper fraction

Irrational fraction

If the incentre and circumentre of a triangle coincide, the triangle is:

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An isoscenes

A right triangle

An equilateral

Which of the following is complete description of Real numbers?

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N∪ W = R

O∪ E = R

P∪ Q = R

Q∪ Q' = R

The point (4,-6) lies in..................quadrant.

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I

II

III

IV

A quadratic equation has:

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Two roots

Three roots

Fourroots

Fiveroots

Cosec²θ - Cot²θ = ______________

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-1

1

0

tanθ

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