Question

2.
Which one is not a solvable group ?​

Answer 1

Answer:

Explanation:

Non-example. The group S5 is not solvable — it has a composition series {E, A5, S5} (and the Jordan–Hölder theorem states that every other composition series is equivalent to that one), giving factor groups isomorphic to A5 and C2; and A5 is not abelian.