Answer:
Throughput of X, Y, Z will be 0.081
The network throughput will be 0.243
Explanation:
Throughput of X will be Tx = Px*(1-Py)*(1-Pz)=0.1*0.9*0.9=0.081
Throughput for Y and Z can be calculated in same way.
Throughput of network = Tx+Ty+Tz=0.081+0.081+0.081=0.243