Whooooo there.
That is a silly question. You or you teacher is forgetting about the total number of stars within a galaxy and cluster.
Whilst a globular cluster has mainly older stars compared to an open cluster it will only contain a few billion stars, whereas a galaxy can have upwards of 500 billion stars, many of them old.
So the answer is not definitive, but I think the answer you are looking for is global clusters.
IT IS A AMOUNT OF SOME THING . CLUSTER OF STARS
The collective noun - cluster
highest amount of rainfall in hawaii is a 15 inches
"NaTongadaMironga" and "Dokabuletê" have the highest amount.
the highest amount of jizz is 1 cup
In India Chennai city has the highest amount of roads.
water molecules have the highest amount of energy when the are heated to infinity.
Cumulative interest or return yields the highest amount of growth
gas
Stratosphere contain highest amount of ozone. It is present as the ozone layer.
amount at stake
Teens need the highest amount of calcium for strengthening of their bones during that tenure of their life cycle.