quick time signiture question

what time signiture would this be in? (ex: 4/4, 3/4, 4/2, 12/8, etc.)

6 Triplet Eight Notes & 5 Sixteenth Notes

I would say that this can't be as written. Perhaps if you change the beat to 6 quarter-note triplets plus 5 eighths..... then you could all it 13/8.

I don't believe there are time signatures in 16ths.

There are time signatures in 16's.
In all reality, it can all be broken down into 4's though....

15/16 = one measure of 8/8 and one measure of 7/8
8/8 = 4/4 and 4/4
7/8 = 4/4 and 3/4

So, 15/16 can be thought as 3 measures of 4/4 and one measure of 3/4 in any order, depending on the type of notes played (quarter, eighth, etc....)

Please correct me if I'm wrong, I'm by no means an expert on time signatures, I just play......this is how our drummer explained it to me..

Well that's possible, but not really recommended.
For example, 6/8 is mathematically the same as 3/4, but to say they are the same is wrong.
In 3/4 the beat is typically on the 1st note (ONE two three ONE two three etc) while in 6/8
you usually have the beats on the 1st and the 3rd note, so it's more like it consists of
two [U]dotted[/U] quarters than 3 regular ones.
You also group the notes together in two groups in 6/8 and 3 groups in 3/4.

What I'm trying to say is that you don't want to simplify time signatures too
much, because there might be some vital information about accents, beats etc
that you miss if you do that. There's often a purpose to why it says 15/16
instead of something else.

:(
Told you!
And I've got more where that came from!