Read the following terms and determine which one is inconsistent in this group.
mean, range, variance, standard deviation, mode, refraction

Correct option is D

Given:

A list of colors: Orange, Violet, Brown, Red, Green, Blue, Yellow.

Formula Used:

There is no direct formula for color identification, but the rule of identifying odd colors is based on the visible spectrum of light (ROYGBIV).

Solution:

1. Orange, Violet, Red, Green, Blue, and Yellow are part of the visible spectrum of light (ROYGBIV).

2. Brown is not part of the spectrum and is instead a combination of other colors, typically made by mixing primary colors.

3. Hence, Brown is the odd one out.