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There are 8 permutations of three coins ... T T T T T H T H T T H H H T T H T H H H T H H H ... counting heads and sorting by count, you get ... 0 - T T T 1 - T T H 1 - T H T 1 - H T T 2 - T H H 2 - H T H 2 - H H T 3 - H H H ... so, the probability of each possible number of heads is 0: 1 in 8, 1: 3 in 8, 2: 3 in 8, and 3: 1 in 8.
t(t-1)
1-800 get-a-life
2000 lb = 1 t(US)2000 lb = 1 t(US)2000 lb = 1 t(US)2000 lb = 1 t(US)2000 lb = 1 t(US)2000 lb = 1 t(US)
Not sure about that. But there are 1000 millilitres (single t) in 1 litre (again, single t).