Question

Suppose x coins are tossed. Write an expression to represent the number of possible outcomes.
A. 2^x

B. x + x

C. X * X

D. 2x

Answer 1

A

but unsure

Answer 2

If you flip one coin the possibilities are {H, T} - two possibilities
If you flip two coins the possibilities are {TT, TH, HT, HH} - four possibilities
If you flip three coins -> {TTT, TTH, THT, THH, HTT, HTH, HHT, HHH} - eight

So you get 2, 4, 8, ...
So the patter is 2^x

Answer 3

Thanks! :)

Answer 4

yup :)