P(E) + P( Ē)=1

Q.

What is $c$ in the probability formula?

Q.

A card is drawn at random from a well shuffled pack of $52$ cards.

The probability of getting a two of heart or two of diamonds is

1. $\frac{1}{26}$

2. $\frac{2}{17}$

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

4. None of these

Q. Sum of the probabilities of an event and its complement is .

Q.

A thief steals an ATM card and must randomly guess the correct four​-digit pin code from a $8$-key keypad, repetition of digits is allowed. What is the probability of a correct guess on the first​ try?

Q.

What is the probability that an event will not occur if the probability of it occurring is $0.3?$

1. $0.3$
2. $0.5$
3. $0.7$
4. None of the above

Q.
$P\left(E\right)+P\left(\overline{E}\right)=1,\mathrm{where}P\left(E\right),P\left(\overline{E}\right)\mathrm{denote}\mathrm{the}\mathrm{probability}\mathrm{of}\mathrm{an}\mathrm{event}E\mathrm{and}\mathrm{the}\mathrm{probability}\mathrm{of}\mathrm{compliment}\mathrm{of}\mathrm{the}\mathrm{event}E,\mathrm{respectively}.$

1. True
2. False

Q. A number is chosen at random from the list $\{2,3,5,7,11,13,17,19\}$. What is the probability of not choosing a prime number?

1. 0
2. $\frac{3}{8}$
3. $\frac{5}{8}$
4. $1$

Q. A glass jar contains $20$ red marbles. If a marble is chosen at random from the jar, the probability of not choosing a red marble is .

Q. The probability of complement event of an impossible events is .

Q. Jacob has a habit of oversleeping in the morning and when he oversleeps, he misses his breakfast. The probability of him oversleeping is 0.4. What is the probability that he eats his breakfast?

1. $0.4$
2. $0.3$
3. $0.5$
   
4. $0.6$
   

Q. On Marcus's birthday, his father tells him to blindfoldedly choose a cloth in a famous cloth store in downtown. The clothing store sells shirts, pants and jackets. What is the complement of picking a jacket?

1. Not picking a pant
2. Not picking a shirt
3. Picking a shirt or a pant
4. None of the above

Q. There are $7$ red and $9$ purple marbles in a bag of marbles. Scarlett picks one marble at random from the bag. What is the possibility that she did not pick a purple marble?

1. $\text{P(red marble)}$
2. $1-\text{P(purple marble)}$
3. $\frac{7}{16}$
4. $\frac{9}{16}$

Q. The probability of not rolling 8 with a single six-sided fair die is .

Q.

Suppose five cards are drawn from a deck.

What is the probability of obtaining a flush (five cards of the same suit)?