Their can be 7 groups hope this helps
It is expected that a number greater than 4 will be rolled 300 times
The sample space of a die is:
S = {1,2,3,4,5,6}
The probability of obtaining a number greater than 4 is:


In 900 rolls, the expected number of number greater than 4 is:

This gives


Hence, it is expected that a number greater than 4 will be rolled 300 times
Read more about expected values at:
brainly.com/question/15858152
You answer for solving for x is w/r+56