A dice is tossed once. Calculate the probability that 5 does not occur.
There are 6 possible outcomes when a dice is tossed: 1, 2, 3, 4, 5, or 6.
The probability of getting a 5 is 1/6.
Therefore, the probability of not getting a 5 is the sum of the probabilities of getting any other number:
P(not getting a 5) = P(1) + P(2) + P(3) + P(4) + P(6)
P(not getting a 5) = 1/6 + 1/6 + 1/6 + 1/6 + 1/6
P(not getting a 5) = 5/6
So, the probability that 5 does not occur when a dice is tossed is 5/6 or approximately 0.8333.