What is more likely to succeed, a bad sales manager with a good team or vice versa?

Neither will succeed, it is important to either get rid of a bad sales manager and bring in a new exciting and vibrant sales manager that matches the skills of the team and can lead them and develop them to achieve success.   A great and successful sales manager will bring out extra ordinary performance from his team and they will achieve results which will be way above expectations.   He will set stretched targets and link it to inner goals and thereby killing two birds with one stone.   individual will achieve his/her personal goals and the team will achieve and excel it's sales targets.   

Both need to be good, but a good leader can bring the good in the bad team.

So, I see it’s important to have a good leader.

The weak sales manager will result in weak performance what so ever, and a good manager with a weak team will result the same. We can't exclude one from the other. Overall successful performance relies heavily on the entire team from top to bottom. It takes time for the good manager to coach a weak team and a heavy cost for the industry. On the other hand, a good team with bad manager is like a nice car with poor steering wheel.

they complete each other

the good team change the bad manager to the best

and the good manager lead the bad team to be the best

a good management can do the best result... other wise they could do the survival business only...

In my openion, it would be the best of both the manager and the team to produce a better result... A weak manager can not propel a weak or good team, while a good manager can do propel a weak team or team member.................

In rare Ocasions,the sales team could realize the weakness of his sales Manager and a leader would come out from within the team and start leading and motivating his friends so that they can survive till Management realized the problem and to save their jobs. in this case the team will produce good survival results but not outstanding results.

If the team is weak this is the easy part if they are flat down that meand that the only way is UP, study their moral, situation, ability and incentives and start to build your way and work upwards by motivating setting incentives targets teaching them the thrill of acheivement and getting then additcted to it 

None of both!

Bad sales manager will demotivate good sales team, provide wrong plans and strategy

Bad team will not be able to execute good plans