Probability Questions -

Two dice are rolled randomly. Find the probability to get sum is 10.
2/5

14

2/9

1/12

5/8

Option D
Required = (6 , 4 ) , (4 , 6) , ( 5, 5) = 3
total = 6 * 6 = 36
probability = 3/36 = 1/12
Two dices are rolled out together, then what is the probability of getting a number of one dice greater than the number of other dice ?
2/3

1/6

3/8

1/8

5/6

Option E
Non-favorable events = (1 , 1) , (2 , 2) , (3 , 3) , (4 , 4) , (5 , 5) , (6,6) = 6
total = 6 * 6 = 36
probability of non-favorable events = 6/36 = 1/6
probability of favorable events = 1 – 1/6 = 5/6
If 2 cards is drawn at randomly from 52 cards, then find the probability of getting both are red cards.
13/28

26/105

28/108

25/102

none of these

Option D
Required = 26C2 = 26 * 25/2 = 13 * 25
total = 52C2 = 52 * 51 / 2 = 26 * 51
probability = 13 * 25 / 26 * 51 = 25 /102
In how many ways, we can arrange the letters of the word ‘LIGHT’ ?
84

28

140

160

120

Option E
Ways = 5! = 5 * 4 * 3 * 2 * 1 = 120
In how many different ways, we can arrange the letters of the word ‘MOUSE’ , so that the middle position is always occupied by ‘S’ ?
25

24

48

42

68

Option B
Ways = 4! = 4 * 3 * 2 * 1 = 24
How many ways 6 books can be selected from 14 different books , if two particular books are always selected ?
495

480

231

384

520

Option A
Available objects = 14 – 2 = 12
Ways = 12C4 = 12 * 11 * 10 * 9/4 * 3 * 2 * 1 = 495
A bag contains 2 white balls, 3 pink balls and 2 black balls. 2 balls are drawn randomly. What is the probability that there is no black balls ?
8/21

10/21

1/8

3/5

6/11

Option B
Required = 5C2 = 5*4/2 = 10
total = 7C2 = 7 * 6 / 2 = 21
probability = 10/21
When two coins are tossed simultaneously, then find the probability of getting at least one tail.
5

3

3/4

1/4

2/5

Option C
Required = ( 1 head , 1 tail ) , ( 2 tails) = (2C1) + (2C2) = 2 + 1 = 3
total = 2^2 = 4
probability = 3/4
A bag contains 4 red balls, 2 blue balls and 2 green balls . If two balls are drawn randomly from the bag , then find the probability of getting both balls of different color.
2/7

5/8

5/7

4

8

Option C
probability = 4C1 * 2C1 / 8C2 + 4C1 * 2C1 / 8C2 + 2C1 * 2C1 / 8C2
(4 * 2 * 2)/ 8 * 7 + (4 * 2 * 2)/ 8 * 7 + (2 * 2 * 2) / 8 * 7 = 2/7 + 2/7 + 1/7 = 5/7
A group of students sitting around a rectangular table, find probability of 2 specified students sitting together.
3/8

2/7

8/7

3/8

6/11

Option B
Favorable cases = 6! * 2!
total cases = 7!
probability = 6! * 2! /7! = 2/7

Quantitative Aptitude: Probability Questions – Set 23

Two dice are rolled randomly. Find the probability to get sum is 10.2/5142/91/125/8Option D Required = (6 , 4 ) ...

Quantitative Aptitude: Probability Questions – Set 22

Two dice are rolled randomly. Find the probability to get sum is 10.2/5142/91/125/8Option D Required = (6 , 4 ) ...

Quantitative Aptitude: Probability Questions – Set 21

If coins are tossed, then find the probability of getting at least 3 tails on the face.8/941/41/22/5Option D Required = ...

Quantitative Aptitude: Probability Questions – Set 20

A bag contains 8 green balls and 12 blue balls. If a ball is drawn randomly, then find the probability ...

Quantitative Aptitude: Probability Questions – Set 19

Two dices are rolled down simultaneously, then find the probability of getting sum of results on both dices more than ...

Quantitative Aptitude: Probability Questions – Set 18

In how many different ways the letter of 'MORBID' can be arranged ?780720620680none of theseOption B required no. of ways=6!=720 ...

Quantitative Aptitude: Probability Questions – Set 17

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Quantitative Aptitude: Probability Questions – Set 16

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Quantitative Aptitude: Probability Questions – Set 15

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Quantitative Aptitude: Probability Questions – Set 14

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Quantitative Aptitude: Probability Questions – Set 13

A bag contains 5 ruby balls and 7 black balls. Two balls are drawn at random without replacement, and then ...

Quantitative Aptitude: Probability Questions – Set 12

Two friends A and B appeared for an selection . Let E1 be the event that A is selected and ...

Quantitative Aptitude: Probability Questions – Set 11

In how many ways can 3 roses and 4 tulips 2 jasmines can be arranged in a garland such that ...

Quantitative Aptitude: Probability Questions – Set 10

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Quantitative Aptitude: Probability Questions – Set 9

In a group of 14 boys and x number of girls, the probability of choosing a girl is 3/5. If ...

Quantitative Aptitude: Probability Questions – Set 8

A basket contains 8 Blue and 10 Brown balls. There is another basket which contains 6 Blue and 8 Brown ...

Quantitative Aptitude: Probability Questions – Set 5

Probability Questions for Bank PO Exams - SBI PO, IBPS PO, NIACL, NICL, BoB PO, and other exams A bag ...