Sure Event

Q.

What is the difference between Atleast and Atmost in Probability?

Q. Question 14
An event is very unlikely to happen. Its probability is closest to
(a) 0.0001
(b) 0.001
(c) 0.01
(d) 0.1

Q. Question 11.
If you toss a coin 6 times and it comes down heads on each occasion. Can you say that the probability of getting a head is 1 ? Given reasons.

Q. The probability of certain event is:

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

Q.

An event whose probability of occurrence is 1, is called as a ___ event.

Q. The probability of guessing the correct answer to a certain test questions is $\frac{x}{12}$. If the probability of not guessing the correct answer to this question is $\frac{2}{3}$, then x =

(a) 2

(b) 3

(c) 4

(d) 6

Q. One card is drawn from a well shuffled deck of 52 playing cards. What is the probability of getting a non-face card?

Q.

What is the probability of a sure event?
(a) 0 (b) $\frac{1}{2}$ (c) 1 (d) less then 1

Q.

If the occurrence of an event precludes the occurrence of a second event, and vice versa, then the events are

__

Q.

Probability to have a holiday on 15${}^{th}$ August in India is ___.

1. 0

2. 1

3. 0.5

4. 1.5

Q. Question 12 (i)
A game of chance consists of spinning an arrow which comes to rest pointing at one of the numbers 1, 2, 3, 4, 5, 6, 7, 8 (see figure) and these are equally likely outcomes. What is the probability that it will point at 8?

Q.

A box contains paper slips with numbers written on them −4 odd and 5 even. Two more paper slips, one with an odd number and another with an even number are put in. Does the probability of getting an odd number increase of decrease? What about the probability of getting an even number?

Q.

Complete the following statements:

(i) Probability of an event E + Probability of the event ‘not E’ = _______.

(ii) The probability of an event that cannot happen is _________. Such as event is called _________.

(iii) The probability of an event that is certain to happen is _________. Such as event is called ________.

(iv) The sum of the probabilities of all the elementary events of an experiment is _________.

(v) The probability of an event is greater than or equal to _______ and less than or equal to _______.

Q. Which of the following can be classified as an uncertain event?

1. A fair coin always landing either heads or tails
2. A regular 6 sided dice landing a number from 1 to 6
3. A fair coin landing on heads

Q.

Events which consist of only one outcome of an experiment are called __

Q.

According to theoretical probability approach, what is the probability of getting a head in tossing of a coin?

Q. Question 13 (ii)
A dice is thrown once. Find the probability of getting a number lying between 2 and 6.

Q.

Which of the following are sure events?

1. Getting a number less than 8 while rolling a dice.

2. getting heads while tossing a coin.

3. getting a non face card from a pack of 52 playing cards.

4. Getting a White ball from a bag which contains 100 black balls.

Q. Which of the following cannot be a probability of an event ?

1. 0.9
2. 99%
3. 0.5
4. 1.25

Q. Question 13 (ii)
A dice is thrown once. Find the probability of getting a number lying between 2 and 6.

Q.

What is the probability of a sure event?

1. greater than 1

2. 1

3. Between 0 and 1

4. 0

Q.

An event whose probability of occurrence is 1, is called as a ___ event.

Q. One card is drawn from a pack of $52$ cards. The probability of getting a face card is:

1. $\frac{1}{13}$
2. $\frac{2}{13}$
3. $\frac{3}{13}$
4. $\frac{4}{13}$

Q. Question 12
If an event cannot occur, then its probability is
(a) 1
(b) $\frac{3}{4}$
(c) $\frac{1}{2}$
(d) 0

Q. Which of the following cannot be the probability of an event?

1. $\frac{3}{4}$
2. $-0.6$
3. $\frac{3}{5}$
4. $1.0001$

Q.

The probability of certain event is:

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

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

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

4. $1$

Q. Complete the statements:
The probability of an event that is certain to happen is ___ .
Such an event is called ___

Q.

The probability of certain (sure) event is ___ .

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

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

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

4. $1$

Q. A card is drawn at random from a well shuffled pack of 52 cards.Find the probability that the card drawn is :

(ii) a spade or a face card.

Q.

The event of getting a word without any vowels (a, e, i, o, u) in a group of words is sure event.

1. True

2. False