Question 1102547
Use three tosses
The combinations are
HHH
HHT
HTH
THH
HTT
THT
TTH
TTT
The event is {HHT, HTH,THH,HTT,THT,TTH}
With four tosses it is 1-4-6-4-1 and at least 1 but no more than two would be 5 of the 16.