Question

thirty percent of the 200 passengers sat alone.
1.Into how many parts were the passengers divided?
2. how many were in each part?
3.how many parts sat alone?
4. how many passengers sat alone?
5. how many parts did not sit alone?
6. how many passengers did not sit alone?

Answer 1

My same comments apply.

6. 120
4. 60

other questions depend on assumptions on the not sitting alone group, and how they were sitting.