The current network total hash rate has been around 20,000 Thash/s. You are buying 0.05 Thash/s.
20,000/0.05 = 400,000.
You will get roughly 1/400,000 of the total BTC mined in a day.
Average blocks per hour has been around 8.
8 * 25(BTC/Block) * 24Ho...