Emma will roll two number cubes labeled 1 through 6. She will record the sum of the two numbers after each roll. She will roll the two cubes 540 times. How many times should Emma expect the sum to equal 5?
1 answer
Out of the 36 possibilities, 5 can be obtained by 1,4 or 4,1 or 2,3 or 3,2. That is probability of 4/36 = 1/9. What is 1/9 of 540?