Question

. Toss a coin two times.
Outcome
Probability

Answer 1

All the possibilities of two tosses are:

H - H

H - T

T - H

T - T

Probabilities:

no Heads . . . 0.25

no Tails . . . . . 0.25

one Heads . . . 0.5

one Tails . . . . . 0.5

two Heads . . . 0.25

two Tails . . . . . 0.25

at least one Heads . . . 0.75

at least one Tails . . . . . 0.75

the two results are the same . . . 0.5

the two results are different . . . 0.5