A hint to get started
Keep a grouped IP pair and separately place the JC2 members
An Art Club has 10 members:2 IP1,2 IP2,3 JC1 and 3 JC2. They take a group photo. Find the number of arrangements with all members
(i) in a row with the 2 IP1 members together and no JC2 members together, marks
(ii) in two equal rows, one in front of the other, with the 4 IP members at the four corners. marks
Afterwards all members sit at a round table. Find the probability that the 2 IP1 members are seated together. marks
[2011/VJC/II/9]
CJC · Review problems · Question 10
Distinguish the pair’s internal order from its position among the base objects.