Find the best answers to your questions at Westonci.ca, where experts and enthusiasts provide accurate, reliable information. Find reliable answers to your questions from a wide community of knowledgeable experts on our user-friendly Q&A platform. Get immediate and reliable solutions to your questions from a community of experienced professionals on our platform.

An experiment consists of rolling two fair number cubes. What is the probability that the sum of the two numbers will
be 8? Express your answer as a fraction in simplest form.



Sagot :

Probability of an event happening = Number of ways it can happen / Total number of outcomes ;
2 + 6 = 8; {2,6}
3 + 5 = 8 ; {3,5}
4 + 4 = 8 ; {4,4}
5 + 3 = 8 ; {5,3}
6 + 2 = 8 ; {6,2}
There are 5 number of ways it can can happen;
{1,1} {1,2} {1,3} {1,4} ... {6,3} {6,4} {6,5} {6,6} 
There are 36 number of outcomes;
The probability is 5 / 36 = 0.138