There's no standard "right" answer.
Once upon a time a fighter squadron had sixteen aircraft. Then it was however many they thought necessary to have sixteen operational at pretty much all times. By some time towards the middle of the war, at least in England, they went to thirty-two planes, so they could fly two sixteen-plane missions without having to repair replace and recuperate. Then it was however many it took to have thirty-two operational pretty much all the time. Eventually there were forty-eight, so they could fly two full-squadron missions and rest a full squadron's worth of pilots and planes, and then I suppose, however many it took to keep fourty-eight operational. I don't think squadrons got that big outside the 8th Air Force, but there certainly wasn't any universal standard number.
I think the original theoretical number of planes in a bomber squadron was twelve rather than sixteen. I don't know of bomber squadrons growing as big as fighter squadrons did.
There were usually three squadrons to a group, but there cold be just two and there were frequently four. There may have been more than four on occasion.
Likewise, there were typically three groups to a wing, but there could be two and often there were four. I don't know if there might have been more than four on some occasions.
Then there were Air Divisions, which were unique to the Eighth Bomber Command. An Air Division had however many groups it took to put all the B-24 groups in one division, and all the B-17 groups into two divisions, so the three Air Divisions got bigger as more groups became operational.
So you can see why nobody seems to know the answer...