Question

A 12-sided die is rolled. The set of equally likely outcomes is {1,2,3,4,5,6,7,8,9,10,11,12). Find the probability of rolling a number less than 7.The probability of rolling a number less than 7 is

Answer 1

Probability is the quantitative measure of the likelihood of the occurrence of an event.

It is mathematically expressed as:

`P=\frac{number\text{ of selected outcome}}{number\text{ of total outcome}}`

We can decide to call the set of numbers below 7 "A".

A = {1, 2, 3, 4, 5, 6}

|A| = 6

We call the universal set, the set containing all the numbers rollable "U"

|U| = 12

Our probability is therefore: