Impossible Events

Q.

An event that cannot possibly happen has a probability of _______ .

1. 3

2. 2

3. 1

4. Zero

Q.

Sum of probabilities of all outcomes in an experiment is ___

Q. When we toss a coin, the probability of getting head or tail is equal.

1. False
2. True

Q.

If S is the event that it will rain tomorrow and P(S) = 0.3. Find P(S').

1. 0.3

2. 0.5

3. 0.7

4. 1

Q. When you flip a coin, then the probability of getting a head is .

Q. When we toss a coin, the probability of getting head or tail is equal.

1. True
2. False

Q.

The probability of guessing the correct answer to certain test questions is $\frac{y}{4}$. If the probability of not guessing the correct answer to these questions is $\frac{3}{4}$, then the value of y is:

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

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

3. 1

4. 0

Q.

If the probability of a quadrilateral being a square is 0.4 then the probability of the quadrilateral not being a square is ___.

1. 1

2. 0.5

3. 0.6

4. 0.4