Question # 1

If y =-7x then E(y) = ...............

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E(x)

-7X

-7E(X)

Zero

the term 'event' is used for.

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Time

Subaet of the sample space

Total number of outcomes

Probability

E(x) = Σxf(x) if it ________ absolutely.

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Equal

Converges

Discrete

None of these

The probability of an impossible event is.

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Positive

Zero

Negative

1

The simplest form of the continuous distribution is the.

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Skewed distribution

Kurtic distribution

Binomial distribution

Uniform distribution

When three coins are tossed simulatneously, P(3 heads) is.

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3/8

1/2

1/8

1/4

The probability of drawing two acea from apack of 52 cards with replacement is.

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1/169

1/10

1/4

1/256

If two coins are tossed, the probability of getting one head and one tail is.

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1/4

2/4

3/4

2/3

The coins are tossed, the porbability of two tails is euql to.

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1/2

1/4

3/4

1

Variance of σ² is equal E to (Y²) - _______?

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E (y)

[E(y)]²

E(y²)

None of these

Waht is the probability that a ball drawn at random from the bag is.

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0.1

0.4

1.0

Cannot be determined from given information

Which of the following cannot be probability of an event.

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0

1

0.32

1.00

The properties of discrete probability distribution are:

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Σp (x) = 1 and Σx. (x) = 1

ΣP (x)= 1 and Σx. P

ΣP(x) = 1 and 0 < P(x) ≤ 1

All of these above

The simple probability of occurrence of an event in called the.

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Joint probability

Conditional probability

Marginal probability

Subjective probability

The probability of an event connot be.

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= 0

> 0

=1

< 0

The Area of trapezoid is equal to:

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sum of paralled sides x base

sum of paralled sides x base/2

2 x base x sum of paralled side

Sum of paralled sides x base/4

Is the tossing of two perfect coins the probability at least one head occur is.

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1/4

1

1/2

3/4

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