Observe the data given below and match the columns that follow: class 0-10 10-20 20-30 30-40 40-50 50-60 frequency 8 10 9 16 32 20 Column A Column B (A) class size of data (a) 30 (B) lower limit of fifth class (b) 15 (C) upper limit of third class (c) 10 (D) class mark of second class (d) 20 (E) frequency of sixth class (e) 40

Class size of data Class size = Upper limit - Lower limit = 10 - 0 = 10 Lower limit of fifth class In the given data table, 5 t h class is 40 - 50 ∴ Lower limit of fifth class is 40 Upper limit of the third class In the given data table, 3 rd class is 20 - 30 ∴ Upper limit of 3 rd class is 30 In the given data table 6 th class is 50 - 60 and its frequency is 20 . Column A Column B (A) class size of data (c) 10 (B) lower limit of fifth class (e) 40 (C) upper limit of third class (a) 30 (D) class mark of second class (b) 15 (E) frequency of sixth class (d) 20

Match the following: column A column B (A) The scale of the probability is (a) 2 3 (B) The probability of not getting a multiple of 3 when a die is thrown is. (b) 1 2 (C) A fair die is thrown, the probability of not getting a prime number is (c) 5 6 (D) In a cricket match hits a boundary 3 times in 3 overs he played. The probability that he did not hit the boundary is (d) from 0 to 1 (inclusive)

The probability of an event lies from 0 to 1 . Therefore, The scale of probability is from 0 to 1 (inclusive). Given that, A die is thrown then the possible outcomes, S = { 1 , 2 , 3 , 4 , 5 , 6 } Let E be the event of not getting a multiple of 3 E = { 1 , 2 , 4 , 5 } We know that, P ( E ) = n ( E ) n ( S ) = 4 6 = 2 3 A fair die is thrown The possible outcomes S = { 1 , 2 , 3 , 4 , 5 , 6 } Let E be the event of not getting a prime number E = { 1 , 4 , 6 } P ( E ) = n ( E ) n ( S ) = 3 6 = 1 2 Let E be the event of a batsman hits a boundary. Let F be the event of a batsman not hitting a boundary Number of balls he played = 3 overs = 18 balls P ( E ) = number of favourable outcomes total number of outcomes = 3 18 = 1 6 We know that, P ( E ) + P ( F ) = 1 ⇒ P F = 1 - 1 6 ⇒ P F = 5 6 ∴ The probability that the batsman did not hit the boundary is 5 6 . Column A Column B (A) The scale of the probability is (d) from 0 to 1 (inclusive) (B) The probability of not getting a multiple of 3 when a die is thrown is. (a) 2 3 (C) A fair die is thrown, the probability of not getting a prime number is (b) 1 2 (D) In a cricket match hits a boundary 3 times in 3 overs he played. The probability that he did not hit the boundary is (c) 5 6

E M B I B E

Activity Plus in Mathematics>Chapter 6 - Statistics and Probability>Enrichment Exercise>Q B

EASY

9th CBSE

IMPORTANT

Earn 100

The experimental probability of an event cannot be greater than 1.

66.67% studentsanswered this correctly

Important Questions on Statistics and Probability

MEDIUM

9th CBSE

IMPORTANT

Activity Plus in Mathematics>Chapter 6 - Statistics and Probability>Enrichment Exercise>Q B

Out of

35

students participating in a debate,

10

are girls. The probability that winner is a boy is

\frac{5}{7} .

EASY

9th CBSE

IMPORTANT

Activity Plus in Mathematics>Chapter 6 - Statistics and Probability>Enrichment Exercise>Q C

An event for an experiment is the collection of _____ outcomes of the experiment. (Some/Total)

EASY

9th CBSE

IMPORTANT

Activity Plus in Mathematics>Chapter 6 - Statistics and Probability>Enrichment Exercise>Q C

\frac{5}{2}

cannot be the _____ of an event.

EASY

9th CBSE

IMPORTANT

Activity Plus in Mathematics>Chapter 6 - Statistics and Probability>Enrichment Exercise>Q C

Probability of an event can be any number between $0$ to _____.

MEDIUM

9th CBSE

IMPORTANT

Activity Plus in Mathematics>Chapter 6 - Statistics and Probability>Enrichment Exercise>Q C

The probability of winning a game is

0.4

, then the probability of losing it is _____.

EASY

9th CBSE

IMPORTANT

Activity Plus in Mathematics>Chapter 6 - Statistics and Probability>Enrichment Exercise>Q C

The empirical probability

P (E)

of an event is given by

P (E) =

Number of trials in which

E

happened

\div

_____ number of trials. (One-fourth/Half/Total)

EASY

9th CBSE

IMPORTANT

Activity Plus in Mathematics>Chapter 6 - Statistics and Probability>Enrichment Exercise>Q D

Observe the data given below and match the columns that follow:

class	0-10	10-20	20-30	30-40	40-50	50-60
frequency	$8$	$10$	$9$	$16$	$32$	$20$

Column A	Column B
(A) class size of data	(a) $30$
(B) lower limit of fifth class	(b) $15$
(C) upper limit of third class	(c) $10$
(D) class mark of second class	(d) $20$
(E) frequency of sixth class	(e) $40$

EASY

9th CBSE

IMPORTANT

Activity Plus in Mathematics>Chapter 6 - Statistics and Probability>Enrichment Exercise>Q D

Match the following:

column A	column B
(A) The scale of the probability is	(a) $\frac{2}{3}$
(B) The probability of not getting a multiple of $3$ when a die is thrown is.	(b) $\frac{1}{2}$
(C) A fair die is thrown, the probability of not getting a prime number is	(c) $\frac{5}{6}$
(D) In a cricket match hits a boundary $3$ times in $3$ overs he played. The probability that he did not hit the boundary is	(d) from $0$ to $1$ (inclusive)

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