Here is the answer:
Network 195.50.0.16/28
Netmask 255.255.255.240
Broadcast 195.50.0.31
Host range 195.50.0.16 – 195.50.0.31
You can get host range by separating IP to NET_ID and HOST_ID
NET ID = (28bits) 11000011.00110010.00000000.0001
HOST ID = (4bits) 0000 ~ 1111
So the host range is :
11000011.00110010.00000000.00010000 195.50.0.16
11000011.00110010.00000000.00011111 195.50.0.31
You can use 'AND' operation to get Broadcast
195.50.0.16 11000011.00110010.00000000.00010000
(HOST_ID are '1') 00000000.00000000.00000000.00001111
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Broadcast 11000011.00110010.00000000.00011111 = 195.50.0.31