In an experiment, a fair coin is tossed 9 times and the face that appears is recorded.
a.) How many elements of the sample space will have no heads?
b.) How many elements of the sample space will start and end with a thead with a total of exactly three heads?

Question

In an experiment, a fair coin is tossed 9 times and the face that appears is recorded. 
a.) How many elements of the sample space will have no heads?
b.) How many elements of the sample space will start and end with a thead with a total of exactly three heads?

anonymous · Answer

Is a.) 1/9? and is b.) 7/9 ?

amistre64 · Answer

you are asked to perform an experiment and use the data you record to answer the questions ... it will be different answers for different people

kropot72 · Answer

a) Only one element of the sample space has the result {T, T, T, T, T, T, T, T, T}
b) When the result starts and ends with a head, there are 7 possible positions for a third head.