Cable car cabins

Thirty tourists came to the cable car. Four tourists boarded each cabin. How many cabins of the cable car are full? How many tourists are in the last one?

Final Answer:

a =  7
b =  2

Step-by-step explanation:

$$\begin{gathered} n=30 \\ 30=4\cdot 7+2 \\ a=\lfloor n/4\rfloor =\lfloor 30/4\rfloor =7 \end{gathered}$$

$b=n-a\cdot 4=30-7\cdot 4=2$

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