What is the probability of the complement of rolling a number less than 5 by using a six-sided die?
1/6
1/3
2/5
2/3

Hence, the probability of the complement of rolling a number less than 5 by using a six-sided die is:

1/3

Let A denote the event of rolling a number less than 5 in a six-sided die.

Now, we know that the Total outcomes are: 6

since, the sample space is given as: {1,2,3,4,5,6}

Also Number of favorable outcomes are: 4

since the numbers which are less than 5 are {1,2,3,4}

Now we have to find:

where P denotes the probability of an event and denote the complement of event A.

We know that:

Now,

Hence,

Hence, the probability of the complement of rolling a number less than 5 by using a six-sided die is:

1/3