Question

edgar rolls two six-sided number cubes. What is the probability that he rolls a 5 on the first cube and a number greater than 4 on the second cube? Use the diagram 1of the sample space to help you.

Answer 1

Answer:D

Step-by-step explanation:

The diagram can be thrown out the window. All we need is to find the chance of a 5, then the chance that the second cube rolls a 5 or a 6.

The cube has 6 possible numbers. The number 5 is one of them. Therefore we have a 1/6 chance of rolling a 5.

The second cube has 6 possible numbers. Two of those are what we want. Therefore we have a 2/6 chance, or rather 1/3 chance of rolling a 5 or 6.

Combining these, we have a 1/6 chance to roll a 5, and on top of that we have a 1/3 chance to roll a number we want.

$\frac{1}{6}*\frac{1}{3}=\frac{1}{18}$

and that is our final answer.