Question # 1

n different objects can be arranged taken all at a time in ______

Choose an answer

(n + 1)! ways

(n - 1)! ways

n! ways

n ways

If A is an event then which of the following is true

Choose an answer

P(A)<0

0≥P(A)≤1

P(A)>0

None

An experiment yields 3 mutually exclusive and exhaustive events A, B, C, if P(A) =2 and P(B) = 3. then P(C) =

Choose an answer

1 / 11

2 / 11

3 / 11

6 / 11

Choose an answer

1 / 2

1 / 3

1 / 4

None of these

A die is thrown, the probability that the dots on the top are prime numbers or odd numbers is

Choose an answer

1/2

2/3

1/3

2/5

Choose an answer

0

-1

1

2

Out of 10, 000 families with 4 children each, the number of families all of whose children are daughters is

Choose an answer

375

500

625

150

Arithmetic mean between 14 and 18 is

Choose an answer

16

17

15

32

Three dice are thrown together. The probability of getting a total of at least 6 is

Choose an answer

103 / 108

10 / 216

93 / 108

None of these

Choose an answer

8

1/56

56

None of these

The sum of all positive integral multiple of 5 less than 100 is

Choose an answer

950

760

1230

875

In a country 55% of the male population has houses in cities while 30% have houses both in cities and in villages find the percentage of the population that has houses only in villages

Choose an answer

45

30

25

50

How many necklaces can be made from 6 beads of different colours?

Choose an answer

120

60

24

15

Choose an answer

The domain of a finite sequence is a

Choose an answer

Set of natural numbers

R

Subset of N

Proper subset of N

If n is a negative integer n! is

Choose an answer

1

0

Unique

Not defined

Choose an answer

P(A) + P(B)

P(A) - P(B)

P(A) . P(B)

P(A) / P(B)

When a selection of object is made without paying regard to the order of selection, it is called

Choose an answer

Sequence

Series

Combination

Permutation

A box containing 10 mangoes out of which 4 are rotter. Two mangoes are taken together from the box. If one of them is found to be good, the probability that the other is also good is

Choose an answer

1 / 3

8 / 15

5 / 13

5 / 9

nCn-r is equal to

Choose an answer

n!

n-1Cr

nCr

None of these

Choose an answer

5

20

9

4

How many arrangements of the letter of the word PAKPATTAN can be made

Choose an answer

How many arrangements of the letters of the word ADDING can be made

Choose an answer

The sample space for tossing a coin twice is

Choose an answer

{H, T}

{HH, HT, TH, TT}

{H, T, HH}

{HH, HT, TT}

A machine operates if all of its three components function. The probability that the first component fails during the year is 0.14, the second component fails is 0.10 and the third component fails is 0.05. the probability that the machine will fail during the year is

Choose an answer

0.2647

0.2692

0.3647

None of these

A class contains nine boys and three girls, in how many ways can the teacher choose a committee of four?

Choose an answer

460

495

272

60

Choose an answer

36

360

24

6

Two cards are drawn at random without replacement. the probability that the first is a king and second is not a king is

Choose an answer

48 / 663

24 / 663

12 / 663

None of these

A sequence is a function whose domain is

Choose an answer

N

Subset of N

R

None of these

The number of the diagonals of a 6 sided figure is

Choose an answer

15

21

9

6

More Classes

Other Links

ECAT Pre General Science Mathematics Chapter 9 Permutation, Combination & Probability Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer