Summary of Probability

Q.

From a pack of 52 cards, I take out a King card and a Queen card. The total number of cards still left is ___.

The number of king cards still left is ___.
Fill both blanks respectively.

Q.

The total number of face cards in a deck of cards is

1. 12

2. 14

3. 16

4. 18

Q. Two dice are thrown simultaneously. Match the following events with their probabilities.

1. $\frac{5}{36}$
2. $\frac{1}{9}$
3. $\frac{1}{6}$
4. \N

Q. Find the probability that a coin tossed falls in each of the shaded region. (all measures in cm)

1. 0.2
2. 0.25
3. 0.66

Q. The probability of getting a 2 when a die is rolled is .

1. $\frac{1}{6}$
2. $\frac{2}{6}$
3. $\frac{1}{26}$
4. 1

Q.

A box contains 3 black balls, 4 red balls and 3 green balls. All the balls are identical in shape and size. Rohit takes out a ball from the bag without looking into it. What is the probability that the ball drawn is a black or green ball?

1. $\frac{3}{10}$

2. $\frac{4}{10}$

3. $\frac{3}{5}$

4. $\frac{1}{2}$

Q. The probability of getting a prime number when a die is rolled is .

1. $\frac{5}{2}$
2. $\frac{1}{2}$
3. $\frac{2}{3}$

Q.

Out of 50 students in a class taking a test, 35 of them passed whereas the other 15 failed. What is the probability that a student selected at random passed the test?

1. 0.15
2. 0.3
3. 0.35
4. 0.7

Q.

A box contains 3 black balls, 4 red balls and 3 green balls. All the balls are identical in shape and size. Rohit takes out a ball from the bag without looking into it. What is the probability that the ball drawn is a black or green ball?

1. $\frac{4}{10}$

2. $\frac{3}{10}$

3. $\frac{1}{2}$

4. $\frac{3}{5}$

Q. The probability of getting a prime number when a die is rolled is .

1. $\frac{5}{2}$
2. $\frac{1}{2}$
3. $\frac{2}{3}$