### Probability mcq:Aptitude

What is the probability of rolling a fair six-sided die and getting an even number?

a) 1/6

b) 1/2

c) 1/3

d) 2/3

Answer: b) 1/2

A bag contains 5 red marbles , 3 blue marbles , and 2 green marbles. What is the probability of drawing a blue marble?

a) 1/10

b) 1/5

c) 3/10

d) 1/3

Answer: c) 3/10

Two cards are drawn from a standard deck of 52 cards without replacement. What is the probability of drawing two hearts?

a) 1/13

b) 1/26

c) 1/39

d) 1/52

Answer: c) 1/39

A jar contains 10 red balls, 5 blue balls, and 3 yellow balls. If a ball is randomly selected , what is the probability of it being red or blue?

a) 1/3

b) 2/3

c) 3/4

d) 4/5

Answer: d) 4/5

In a deck of cards, what is the probability of drawing a face card (jack, queen, or king)?

a) 1/13

b) 3/13

c) 4/13

d) 1/4

Answer: c) 4/13

A bag contains 6 red balls 4 green balls, and 5 blue balls . If a ball is randomly selected what is the probability, of it not being red?

a) 1/3

b) 4/5

c) 5/15

d) 10/15

Answer: d) 10/15

Two dice are rolled. What is the probability of getting a sum of 7?

a) 1/6

b) 1/9

c) 1/12

d) 1/36

Answer: c) 1/6

A box contains 8 red balls, 5 blue balls, and 4 green balls. Two balls are randomly drawn without replacement. What is the probability of drawing a red ball and then a blue ball?

a) 2/17

b) 8/51

c) 5/51

d) 4/51

Answer: b) 8/51

In a class , there are 15 boys and 10 girls. If a student is selected at random what is the probability of selecting a girl ?

a) 1/2

b) 2/5

c) 3/5

d) 2/3

Answer: b) 2/5

A fair coin is flipped three times. What is the probability of getting at least one head?

a) 1/8

b) 3/8

c) 1/2

d) 7/8

Answer: d) 7/8

A bag contains 4 red marbles and 6 green marbles. If two marbles are drawn without replacement, what is the probability of drawing two green marbles?

a) 1/10

b) 1/5

c) 3/10

d) 3/5

Answer: c) 3/10

In a deck of cards, what is the probability of drawing a spade or a club?

a) 1/13

b) 1/4

c) 1/2

d) 3/4

Answer: d) 3/4

A bag contains 8 red balls and 4 green balls. If two balls are drawn with replacement, what is the probability of drawing two red balls?

a) 1/3

b) 1/4

c) 1/6

d) 1/9

Answer: b) 1/4

Three cards are drawn from a standard deck of 52 cards without replacement. What is the probability of drawing three hearts?

a) 1/17

b) 1/26

c) 1/39

d) 1/52

Answer: b) 1/26

In a bag , there are 5 red balls, 3 blue balls and 2 green balls. If a ball is randomly selected , what is the probability of it being red or blue?

a) 4/10

b) 1/2

c) 3/10

d) 7/10

Answer: d) 7/10

A jar contains 6 red balls , 4 green balls, and 2 yellow balls. If a ball is randomly selected what is the probability of it not being red?

a) 1/3

b) 1/2

c) 2/3

d) 3/4

Answer: c) 2/3

Two dice are rolled. What is the probability of getting a sum greater than 9?

a) 1/6

b) 1/9

c) 1/12

d) 1/36

Answer: c) 1/12

A box contains 7 red balls, 5 blue balls, and 3 green balls. Two balls are randomly drawn without replacement. What is the probability of drawing a red ball and then a blue ball?

a) 7/45

b) 7/65

c) 5/45

d) 5/65

Answer: c) 5/45

In a class , there are 20 boys and 15 girls . If a student is selected at random , what is the probability of selecting a girl?

a) 1/2

b) 1/3

c) 2/3

d) 3/5

Answer: d) 3/5

A fair coin is flipped four times. What is the probability of getting exactly two heads?

a) 1/4

b) 3/8

c) 3/16

d) 1/2

Answer: b) 3/8

A bag contains 3 red marbles and 5 green marbles. If two marbles are drawn without replacement, what is the probability of drawing two green marbles?

a) 1/16

b) 1/10

c) 2/7

d) 2/15

Answer: d) 2/15

In a deck of cards, what is the probability of drawing a heart or a diamond?

a) 1/13

b) 1/4

c) 1/2

d) 3/4

Answer: c) 1/2

A bag contains 6 red balls and 4 green balls. If two balls are drawn with replacement, what is the probability of drawing two red balls?

a) 1/6

b) 1/16

c) 1/36

d) 1/64

Answer: c) 1/36

Three cards are drawn from a standard deck of 52 cards without replacement. What is the probability of drawing three spades?

a) 1/17

b) 1/26

c) 1/39

d) 1/52

Answer: b) 1/26

In a bag , there are 4 red balls, 3 blue balls, and 2 green balls. If a ball is randomly selected , what is the probability of it being red or blue?

a) 7/9

b) 4/9

c) 5/9

d) 2/3

Answer: c) 5/9

A jar contains 7 red balls, 4 green balls, and 3 yellow balls. If a ball is randomly selected, what is the probability of it not being red?

a) 1/3

b) 1/2

c) 3/4

d) 5/7

Answer: d) 5/7

Two dice are rolled. What is the probability of getting a sum less than 4?

a) 1/6

b) 1/9

c) 1/12

d) 1/36

Answer: a) 1/6

A box contains 6 red balls, 3 blue balls, and 2 green balls. Two balls are randomly drawn without replacement. What is the probability of drawing a red ball and then a blue ball?

a) 3/55

b) 1/10

c) 1/15

d) 1/5

Answer: c) 1/15

In a class, there are 25 boys and 15 girls. If a student is selected at random, what is the probability of selecting a girl?

a) 1/2

b) 1/3

c) 2/3

d) 3/5

Answer: d) 3/5

A fair coin is flipped five times. What is the probability of getting at least three heads?

a) 1/8

b) 3/8

c) 1/2

d) 7/8

Answer: b) 3/8