Question

There are nine different books on a shelf, four red and five are green. Number of ways in w̧hich it is possible to arrange these books if

Column I		Column II
A	the red books must be together and green books together	P	$(4) 6 !$
B	the red books must be together whereas the green books may or may not be together	Q	$(8) 6 !$
C	no two books of the same colour are adjacent	R	$(20) 6 !$
D	if the books are arranged on a round table and no two of the three specified books are together	S	$(24) 6 !$

• A. $A \rightarrow P ; B \rightarrow S ; C \rightarrow P ; D \rightarrow R$
• B. $A \rightarrow Q ; B \rightarrow S ; C \rightarrow P ; D \rightarrow R$
• C. $A \rightarrow R ; B \rightarrow S ; C \rightarrow P ; D \rightarrow R$
• D. $A \rightarrow S ; B \rightarrow S ; C \rightarrow P ; D \rightarrow R$

Answer 1

Answer: (B)

Correct answer is (b) $A \rightarrow Q ; B \rightarrow S ; C \rightarrow P ; D \rightarrow R$