We roll

We roll two dice
A. - what is the probability that the sum of the falling numbers is at most 4
B. - is at least 10
C. - is divisible by 5?

Correct answer:

a =  0.1667
b =  0.1111
c =  0.1944

Step-by-step explanation:

$$\begin{gathered} 1+1,2+1,1+2,2+2,3+1,1+3 \\ a={\displaystyle \frac{6}{6\cdot 6}}={\displaystyle \frac{1}{6}}=0.1667 \end{gathered}$$

$$\begin{gathered} 5+5,5+6,6+5,6+6 \\ b={\displaystyle \frac{4}{6\cdot 6}}={\displaystyle \frac{1}{9}}=0.1111 \end{gathered}$$

$$\begin{gathered} 1+4,4+1,2+3,3+2,5+5,6+4,4+6 \\ c={\displaystyle \frac{7}{6\cdot 6}}={\displaystyle \frac{7}{36}}=0.1944 \end{gathered}$$

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