Miloš 2

Miloš works in an optician's. He helps his friend Martin with the selection of lenses for prescription glasses. These can have:
- a special anti-scratch treatment,
- anti-reflection – ensures greater permeability of light into the eye,
- photochromic – darkening of the lenses when spending time in daylight.

From how many possibilities can Martin choose if Miloš recommended him two manufacturers, and the mentioned properties of lenses can be combined arbitrarily?

Final Answer:

n =  16

Step-by-step explanation:

$$\begin{gathered} v=2 \\ n=v\cdot 2^3=2\cdot 2^3=16 \end{gathered}$$

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