The total of faces touching the ground is 15.
Given that, four usual dice are thrown on the ground. The total of numbers on the top faces of these four dice is 13 as the top faces showed 4, 3, 1 and 5 respectively.
We need to find what is the total of faces touching the ground.
<h3>What is probability?</h3>
The ratio of favourable outcomes to all possible outcomes of an event is known as probability. The number of positive outcomes for an experiment with 'n' possible outcomes can be represented by x. The probability of an event can be calculated using the following formula.
Probability(Event) = Possible outcomes/Total number of outcomes = x/n
The sum of the numbers on two opposite faces is 7. So, 1 is opposite to 6, 2 is opposite to 5 and 3 is opposite to 4.
Now, when 4, 3, 1 and 5 are the numbers on the top faces, thus 3, 4, 6 and 2 respectively are the numbers on the face down.
The total of the numbers =3+4+6+2=15.
Therefore, the total of faces touching the ground is 15.
To learn more about probability visit:
brainly.com/question/9793303.
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