Sum of Probabilities of Favorable and Unfavorable Event

Q.

A bag contains $3$ black and $4$ white balls. Two balls are drawn one by one at random without replacement. The probability that the second drawn ball is white

1. $\frac{4}{49}$

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

3. $\frac{4}{7}$

4. $\frac{12}{49}$

Q.

A bag contains 3 white and 5 black balls. If one ball is drawn, then the probability that is black is

1. $3/8$

2. $5/8$

3. $6/8$

4. $10/20$

Q. In a deck of 52 cards, there are 4 kings, 4 queens, and 4 jacks, known as the face cards. If a card is drawn from the deck, what is the probability that it is a face card?

1. $\frac{3}{13}$
2. $\frac{5}{13}$
3. $\frac{8}{13}$
4. $\frac{10}{13}$

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. 1

4. 0.7

Q.

If $P\left(A\right)$ and $P\left(\overline{A}\right)$ are complementary events and $P\left(A\right)$ = 0.15, then $P\left(\overline{A}\right)$= ?

1. 0.3

2. 0.85

3. Cannot be determined

4. 0.35

Q. In a deck of 52 cards, there are 4 kings, 4 queens, and 4 jacks, known as the face cards. If a card is drawn from the deck, what is the probability that it is a face card?

1. $\frac{3}{13}$
2. $\frac{5}{13}$
3. $\frac{8}{13}$
4. $\frac{10}{13}$

Q.

Sum of probabilities of all outcomes in an experiment is__

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.

The probability of it being a rainy day is 0.75, then the probability of it not being a rainy day is

1. 0.25

2. 0.35

3. 0.05

4. 2.5

Q.

If the probability of an event happening is x, then the probability of event not happening is

1. 1/x

2. 1 - x

3. x - 1

4. x + 1

Q.

The probability of winning a game is $\frac{2}{5}$, the probability of losing is__. (in decimal form)

Q.

The probability of an event not happening is 0.95, then the probability of event happening is

1. 5.0

2. 0.5

3. 0.05

4. 0.25

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

Q.

In a deck of 52 cards, there are 4 kings, 4 queens, 4 jacks . These are known as face cards. If one card from the deck is withdrawn, what is the probability that it is not a face card?

1. 

2. 

3. 

4.