Page 52 - Mathematics Class - XI

Case-Study Based Questions
Case-Study Based Questions

Six students–Mohan, Ajay, Parul, Renu, Dhruv, Harsh are sitting in a
playground in a line.

Based upon the above data. Answer the following questions.
1. Total number of ways of sitting arrangement of six students is

(a) 120 (b) 360
(c) 720 (d) None of these
2. Total number of arrangement of sitting if Renu and Dhruv sit together is
(a) 240 (b) 120 (c) 360 (d) None of these

3. Total number of arrangement ‘Mohan and Parul’ sitting at extreme position is
(a) 12 (b) 48 (c) 24 (d) None of these

4. Total number of arrangement of sitting if Renu and Dhruv not sit together is
(a) 420 (b) 240 (c) 480 (d) None of these

Assertion-Reason Based Questions
Assertion-Reason Based Questions
Directions for Questions 1 to 2: In each of the questions given below, there are two statements marked as
Assertion (A) and Reason (R). Mark your answer as per the codes provided below:
(a) Both A and R are true and R is the correct explanation of A.

(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true.
Q. 1. Consider the word ‘SMALL’.

Assertion (A) : Total number of 3 letter words from the letters of given word is 13.
Reason (R) : Number of words having all the letters distinct = 4 and the number of words having
two arc alike and third different = 9.

Q. 2. Assertion (A) : A polygon has 44 diagonals and number of sides are 11.
Reason (R) : From n distinct objects, r objects can be selected in C ways.
n
r

Answers

Case-Study Based Questions: 1. (c) 2. (a) 3. (b) 4. (c)
Assertion-Reason Based Questions: 1. (a) 2. (a)

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