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This is a "it depends" kind of answer. You could easily argue, none of the above for that questions and its possible answers.
A hub emulates original shared Ethernet wire, which means all active nodes share access to 10 Mbps.
For starters, I believe, there are 11 active hosts, on the hub. The 10 noted client hosts, and the link to a switch hosting the server. Assuming the server is only supporting the one server, effectively the server is just another host on the hub (via the switch).
As all the connected hosts share 10 Mbps, each, assuming all wanted to transmit at 10 Mbps (or more) would get a fair share (more or less) of the 10 Mbps. If all 10 clients sent to the server, each client would get roughly 1 Mbps. (Because of collisions, some of the 10 Mbps bandwidth would be lost, but not at much as many suppose, so each client would effectively have less than 1 Mbps.)
If just one host (including the server), alone was transmitting, it would get the full 10 Mbps. (Again, as soon as more than one host desires to transmit, they will, about equally, share the bandwidth, less bandwidth lost to collisions.)
Also remember, communication is often two way, so even a client sending to the server, will share the 10 Mbps with something like server ACKs. The latter would likely use very little bandwidth, but it too takes bandwidth away from the transmitting client and causes collisions.
So for one extreme, if only one client host was transmitting, it could transmit at 10 Mbps.
However for the other extreme, if all hosts (including the server) were transmitting at best rate, each client would get about 1/11 Mbps, less bandwidth lost to collisions, to the server.
