Textbook ExpertVerified Tutor
23 Oct 2021
Given information
Roll two fair dice. Each die has six faces.
is the event that either a three or four is rolled first, followed by an even number.
is the event that the sum of the two rolls is at most seven.
Step-by-step explanation
Step 1.
is the probability of event occurring, given that event occurs.
In the given situation when:
is the event that either a three or four is rolled first, followed by an even number.
is the event that the sum of the two rolls is at most seven.
is the probability that either a three or four is rolled first, followed by an even number, given that the sum of the two rolls is at most seven.
Consider the sample space as follows:
,
.
The set of event occurring is:
The set of event occurring is:
Therefore,
Consider the formula:
, then
.
Hence,
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