Which can not be a value for a probability

1, 0, 0.3, 3/10, 100

100 is not a valid probability. Probability is always 0 (never), 1 (always), or some value in between--fractional.

100 is not a probability.

1 = Definite
0 = Impossible
0.3 = Unlikely
3/10 = Unlikely

0 - 1 are usually the values of probabilities. You can have percentages, fractions and decimals, but you never really have a number like 100.

I would say 100 because probability is usually a value between 0 and 1 which the rest are.. not too sure but i hope this helps :)

Probabilities must lie between 0 and 1 inclusive so 100 cannot be a probability.

0 ≤ p ≤ 1