Suppose you roll a number cube. What is the theoretical probability of rolling a number less than 6?

Probability = desired outcomes / total possible outcomes.

desired outcomes = rolling numbers less than 6

= {1,2,3,4,5}

= 5 desired outcomes

total possible outcomes = {1,2,3,4,5,6 }

= 6 possible outcomes

so 5/6

Probability of rolling a number less than 6 is 5/6