Question # 1

A dice is rolled. The probability that the dots on the top are greater than 4 is

Choose an answer

1/6

1/3

1/2

1

Choose an answer

5

20

9

4

n(n - 1) (n - 2) in factorial form is

Choose an answer

The number of permutation that can be formed from the letters of the word OBJECT is

Choose an answer

700

600

720

620

The value of n, when ⁿP₂= 20 is

Choose an answer

3

4

6

5

How many signals can be given by 5 flags of different colours, using 3 flags at a time

Choose an answer

120

60

24

15

The key for opening a door is in a bunch of 10 keys. A man attempts to open the door by trying the keys at random discarding the wrong key. The probability that the door is opened in the 5th trial is

Choose an answer

1 / 10

2 / 10

3 / 10

4 / 10

Choose an answer

How many different 5-digit even numbers are possible form digit 1,2,4,6,8

Choose an answer

4 : 4!

4!

5!

4!+4!

For two events A and B if P(A) = P (A/B) = 1/4 and P(B/A) = 1/2, then

Choose an answer

A is sub-event of B

A and B are mutually exclusive

A and B are independent and P(A/B) = 3/4

None of these

Riaz, Saba. Maria, Shehzad are to give speeches in a class. The teacher can arrange the order of their presentation in

Choose an answer

4 ways

12 ways

256 ways

24 ways

In a class of 100 students, 60 drink tea, 50 drink coffee and 30 drink both. A student from his class is selected at takes at last one of 2 drinks is

Choose an answer

2 / 5

3 / 5

4 / 5

None of these

The probability that a person A will be alive 15 years hence is 5/7 and the probability that another person B will be alive 15 years hence is 7/9. Find the probability that both will be alive 15 years hence

Choose an answer

4/63

5/9

45/49

None of these

Arithmetic mean between 14 and 18 is

Choose an answer

16

17

15

32

A combination lock on a suitcase has 3 wheels each labeled with nine digits from 1 to 9. If an opening combination is a particular sequence of three digits with no repeats, the probability of a person guessing the right combination is

Choose an answer

1 / 500

1 / 504

1 / 252

1 / 250

A die is rolled. What is the probability that the dots on the top are greater than 4?

Choose an answer

1/4

1/2

1/3

1/33

The probability that the sum of dots appearing in two successive thrown of two dice, in every time 7 is

Choose an answer

1/5

1/36

1/7

1/63

The sum of all odd numbers between 100 and 200 is

Choose an answer

6200

7500

6500

3750

Three numbers are chosen random without replacement from {1, 2, 3, ...., 10}. the probability that minimum of the chosen numbering is 3 or their maximum is 7

Choose an answer

7 / 40

5 / 40

11 / 40

None of these

An unbiased die is thrown. Then the probability of getting a prime is

Choose an answer

1/2

2/3

3/4

None of these

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

Choose an answer

120

60

24

15

The sum of all even numbers less than 100 is

Choose an answer

2450

2352

2272

2468

Choose an answer

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

The sum if 1,3,5,7,9........ up to 20 terms is

Choose an answer

400

472

563

264

A committee consists of 9 experts taken from three institutions A, B, and C, of which 2 are from, A, 3 form B and 4 from C. If three experts resign, then the probability that they belong to different institutions is

Choose an answer

1 / 729

1 / 24

1 / 21

2 / 7

n!/(n-1)!=

Choose an answer

n

n!

(n-1)!

0!

The domain of a finite sequence is a

Choose an answer

Set of natural numbers

R

Subset of N

Proper subset of N

5 unbiased coins coins are tossed simultaneously. The probability of getting at least one head is

Choose an answer

1 / 32

31 / 32

1 / 16

None of these

Choose an answer

8

1/56

56

None of these

(n + 2) (n + 1) n= ______

Choose an answer

Fifteen girls compete in a race. The first three places can be taken by them in

Choose an answer

3! ways

12! ways

15 x 14 x 13 ways

42 ways

If n is a negative integer n! is

Choose an answer

1

0

Unique

Not defined

Choose an answer

120

5

4

6

More Classes

Other Links

Mathematics ECAT Pre Engineering Chapter 9 Permutation, Combination and 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

Choose an answer

Choose an answer

Choose an answer