Question

Out of eight crew members three particular members can sit only on the left side. Another two particular members can sit only on the right side. Find the numbers of ways in which the crew can be arranged so that four men can sit on each side.

Answer 1

3 crew on left can sit in 6 possible ways
2crew members on right side can sit 2 possible ways
3crew members ofmiddle can sit 6 possible ways
so total no. of patterns= 6×6×2=72 ways crew can be arranged

Answer 2

3 crew members on the left sit in 6 possible ways, 2 crew members on right side can sit 6 possible ways.

3 crew members of middle can sit 6 possible ways...

So total number of patterns = 6×6×2

= 72

72 ways crew can be arranged...