Q1.
Q2.
Q3.
A person tossed a coin twice, find the probability of getting (i) one head (ii) no
head.
A die is thrown once, find the probability of getting an (i) even number (ii) odd
number.
Two coins are tossed simultaneously
times, and we get (i) no head
times
(ii) one head
times and (iii) two heads
times. Find the probability of each
Q4.
Q5.
event.
A die is thrown. Find the probability of getting a prime number.
A coin tossed
times and it observed that
times a head comes up. Find the
Q6.
probability that a tail comes up.
Two coins are tossed simultaneously
times , (ii) one head
Q7.
times, and (iii) no head
times. Find the probability of
occurrence of each of these events.
The record of weather station shows that out of
consecutive days its weather
forecast were correct
Q8.
times, and we get (i) two heads
times.
(i) What is the probability that on a given day it was correct?
(ii) What is the probability that it was not correct on a given day?
What is the probability that a number selected from the number
is a
multiple of ?
Q9.
The percentages of marks obtained by a student in the monthly unit test are given
below:
Unit Test
I
II
III
IV
IV
% of marks obtained
Based on this data, find the probability that the student gets more than
Q10.
in a unit test.
In a cricket match, batsman hits the boundary
times out of
marks
balls played by
him. Find the probability that the boundary is not hit by the ball.
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Q11.
In a section of
of
students obatained more than
marks in English out
students. If a student is selected randomly, find the probability that he
scored less than
Q12.
class
marks in English.
Tickets numbered from
are mixed up together and then a ticket is drawn at
random. What is the probability that the ticket has a number which is a multiple
of
?
Q13.
A die is thrown. What is the probability of getting a multiple of
Q14.
Q15.
What is the probability of getting a doublet of even number, when two dice are
thrown simultaneously?
In a lottery of
tickets numbered
, one ticket is drawn. Now, what is the
Q16.
Q17.
probability that the drawn ticket bears a prime number?
Define Empirical probability P (E) of an event happening.
Cards marked
are placed in a box and mixed thoroughly. A card is drawn
at random. Find the probability that it bears a number less than
Q18.
Q19.
Q20.
A bag contains
red balls,
black and
?
.
white balls. A ball is drawn at random
from the bag. What is the probability that the ball drawn is (i) white, (ii) red and
(ii) black?
Fill in the blanks:
(i) Probability of a sure event is ……..
(ii) Probability of an impossible event is ………
(iii) Probability of an event (other than sure and impossible event) lies between
……….
A Card is drawn at random from a pack of
playing cards. Find the probability
that the card drawn is neither a queen nor a jack.
Answers
A1.
(i)
(ii)
A2.
(i)
(ii)
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A3.
(i)
(ii)
(iii)
A4.
A5.
A6.
(i)
A7.
(i)
(ii)
(iii)
(ii)
A8.
A9.
A10.
A11.
A12.
A13.
A14.
A15.
A16.
It is defined as the number of trials in which the event happened upon the total
number of trials.
A17.
A18.
(i)
A19.
(i)
(ii)
(ii)
(iii)
(iii)
A20.
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