Sum of Probabilities

Q.

What is the probability of getting $2$ heads in $3$ tosses?

Q.

In a simultaneous toss of four coins, what is the probability of getting exactly three heads

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

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

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

4. None of these

Q.

In a simultaneous throw of three coins, what is the probability of getting at least $2$ tails.

1. $\frac{1}{8}$

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

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

4. None of these

Q. In a box, there are 10 white balls, 8 red balls and some black balls. If the probability of selecting a black ball is equal to the sum of probabilities of selecting a white ball and a red ball, then the number of black balls in the box is

1. 
   10
2. 
   8
3. 
   18
4. 
   30

Q.

If you flip three fair coins, what is the probability that youll get all three tails?

Q.

Sum of probabilities of all outcomes in an experiment is__

Q.

Three coins are tossed simultaneously. Find the probability of getting three heads.

Q.

Three coins are tossed together. Find the probability of getting(i)exactly two heads(ii)At least two heads(iii) At least one head and one tail

Q.

The probability of getting a rotten egg from a lot of $400$ eggs is $0.035$. Find the number of rotten eggs in the lost.

Q.

What is the probability of getting a sum of 13 when rolling a pair of dice?

1. 0

2. $\frac{1}{13}$

3. $\frac{1}{12}$

4. $\frac{1}{11}$

Q.

Two coins are tossed simultaneously. Find the probability of getting: (i)Two heads, (ii)At least one head, (iii)No head

Q.

Three coins are tossed simultaneously. Find the probability of getting exactly two heads.

Q.

If three coins are tossed simultaneously, then the probability of getting at least one head and tail is _____.

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

Q.

What is the probability of getting a sum of 7 on two rolls of a die?

1. $\frac{7}{12}$

2. $\frac{1}{11}$

3. $\frac{1}{6}$

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

Q.

The probability of getting at least one tail , when a coin is thrown 4 times is

1. $\frac{1}{16}$

2. $\frac{15}{16}$

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

4. $\frac{1}{8}$

Q.

Complete the table for the following events:

Tossing two coins

Number of total outcomes	Possible outcomes	Probability of each outcome