Question # 1

The spread or scatterness of observations in a data set is called:

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Average

Dispersion

Central tendency

Tan 90 =_________.

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√3/2

1/√3

0

undefined

In which quadrant only Sinθ and Co cosθ are positive?

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I

II

III

IV

The sum of 30 observations is 1500. Its average will be:

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1500

150

15

None of these

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If b²-4ac<0, then the roots of ax²+bx+c=0 are:

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Irrational

Rational

Imaginary

None of these

Area of ΔABC = :

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1/2(base)(altitude)

2(base)(altitude)

1/2 x base/altitude

(base)(altitude)

The formula of range is:

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X_max -X_min

X_max + X_min

groups/wight

none of these

The mode in the data 1,3,5,3,7,9

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1

3

5

7

The discriminant of 7x²+8x+1=0 is:

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32

34

36

38

In a unit circle, cosθ = ___________

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y

x

y/x

None of these

In equation 5^1+x+5^1-x = 26, we put:

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5^2x=y

5^1+x=y

5^1-x=y

5^x=y

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

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C.G.S System

Sexagesimal system

M.K.S.System

circular system

The set having only one element is called:

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Null set

Power set

Singleton set

Subset

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1.5cm

2.0cm

2.5cm

3.5cm

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