So we get through of A plus the through-put of B and we keep adding up.

And since it's the same equation for each station, we then just get that the total

through-put is equal to the number of stations we have times the per-station

through-put, very simple. [SOUND] So, if we go back to our example

again. Suppose the probability of transmission,

[SOUND] was 0.8. So we have Was 20%.

So then we convert that into a decimal, we get 0.2.

And then the per-station throughput would be equal to the probability of

transmission, which is 0.2. Times 1 minus the probability of

transmission. And here we have five stations, we'll

just assume that [INAUDIBLE] five stations.

So we, then we'd have 1 minus 0.2. And we have that four times 1 minus 0.2,

times 1 minus 0.2, times 1 minus 0.2. And if you do that out, we get 0.2 times

0.8 times 0.8 times 0.8 times 0.8 again, [INAUDIBLE] broken record here and then

that is equal to 0.08192, which is 8.192%, so what that means is that every

station is going to get 8% through. Then the total throughput, we would get

by multiplying the per-station throughput.

By the total number of stations. So the total then, figure this out, would

be equal to the per-station times the total number of stations, which is 0.4096

or 40.96%. Lets also point out as well that here we

are dealing with throughput in percentages right so we are dealing with

them as percent's and in reality we said before that throughput is measured in

bytes per second, right so typically we'll see like mega bytes per second and

the reason that we are doing in a percent's here it's just comparatively

the same. To understand this you have to recall how

we get this percentage in the first place.

So we're basing this relative to the idea that the maximum throughput we could have

is one frame in one time slot. So in each time slot that we have, we

could just have one frame. Now, each frame is going to have a

certain amount of bits in it and each time slot is going to have a certain

amount of seconds. Or it's going to.

Actually be fractions of a second. So this is a time slot and this is a

frame up here rather than it being a bit and a second that we're talking about.

But it's just a multiplicative factor for us to get there.

We'll just have to multiply by the number of frames that we have.

Per bit, or the other way around. And then we have to multiply by the

number of time slots that we have per second in order to get bits per second.

And so, in this percentage rate here, when we say 40.96%, we mean that 40.9% of

the time slots we are going to have a successful message delivery.

And in the other 60%, approximately 60%, we're not going to have a successful

message delivery. And in this case right here, we're saying

that we have, this is, again, remember this is per station through put.

So we're saying Relative to the maximum that this station could get if it was the

only station in the network, which is not the case we are getting 8% of what we

could in maximum get if we were transmitting successful in each time

slot, so usually these percentages are relative to the maximum, or the

percentages of the maximum, which would be 100% through-put or meaning that we

get one frame in each time slot.