math
posted by 6th grader .
If you roll a fair number cube 30 times, how many times would you expect to roll a number less than 3

2/6 * 30 = 10 times

can you explain each step?

2 (total numbers less than 3 on a cube)
__
6 (total numbers on a cube)
2/6 * 30 (30 is how many time you rolled)
2/6 * 30 =10 times