1. The committee were divided in their opinions.

Question

2. The committee was divided in its opinions.
3. The committee was divided in their opinions.
[Which senteces are grammatical?]

Answer 1

Do you need which sentences are grammatically correct?
1. The committee were divided in their opinions.
3. The committee was divided in their opinions.

Answer 2

If you want to consider the committee as a whole, then only #2 is correct.

If you want to consider the committee members as individuals, then the sentence should be --
The committee members were divided in their opinions.

Answer 3

Their opinion/ their opinions?