200+ Probability-and-statistics Questions

Probability-and-statistics Questions Set 22:

Quiz Mode

Probability of getting 7 on a dice is _____

1/2

1/3

Solution:

If three dices are rolled simultaneously then what is the total number of possible outcomes?

Solution:

If n coins are tossed simultaneously what is the total number of outcomes ?

2^n-1

2ⁿ⁺¹

2ⁿ

2^n-2

Solution:

If the standard deviation of a data is 0.012 . Find the variance.

0.144

0.00144

0.000144

0.0000144

Solution:

In a single throw of a dice, what is the probability of getting a number greater than 1?

3/5

4/5

5/6

4/7

Solution:

The change in which of following terms does not affect the standard deviation?

Origin

Scale

Origin and scale

Neither origin nor scale

Solution:

A bag contains 4 white balls and 6 black balls. Find the probability to choose 2 balls in the same color.

8/15

7/15

11/15

None of the above

Solution:

Rahul obtained 20 and 25 marks in first two tests. Find the minimum marks he should get in the third test to have an average of at least 30 marks.

Solution:

If the standard deviation of the numbers 2, 4, 5 & 6 is a constant 'a' , then find the standard deviation of the numbers 4, 6, 7 & 8.

a + 2

Solution:

A coin is tossed and if it is head then a red dice is rolled and if it is tail then a blue dice is rolled then what is the possible number of outcomes?

Solution:

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Probability-and-statistics Questions Set 22:

Probability of getting 7 on a dice is _____

Solution:

If three dices are rolled simultaneously then what is the total number of possible outcomes?

Solution:

If n coins are tossed simultaneously what is the total number of outcomes ?

Solution:

If the standard deviation of a data is 0.012 . Find the variance.

Solution:

In a single throw of a dice, what is the probability of getting a number greater than 1?

Solution:

The change in which of following terms does not affect the standard deviation?

Solution:

A bag contains 4 white balls and 6 black balls. Find the probability to choose 2 balls in the same color.

Solution:

Rahul obtained 20 and 25 marks in first two tests. Find the minimum marks he should get in the third test to have an average of at least 30 marks.

Solution:

If the standard deviation of the numbers 2, 4, 5 & 6 is a constant 'a' , then find the standard deviation of the numbers 4, 6, 7 & 8.

Solution:

A coin is tossed and if it is head then a red dice is rolled and if it is tail then a blue dice is rolled then what is the possible number of outcomes?

Solution:

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