In a row of 15 mugs three are blue and the rest are red what fraction of the mugs are blue in math

3/15 are blue (in math)

To find the fraction of blue mugs in a row of 15 mugs, we first need to determine the number of blue mugs and the number of red mugs.

Given that three mugs are blue, we subtract this number from the total number of mugs to find the number of red mugs:
15 total mugs - 3 blue mugs = 12 red mugs

Now, we can express the fraction of blue mugs as the ratio of the number of blue mugs to the total number of mugs:
Fraction of blue mugs = Number of blue mugs / Total number of mugs.

Plugging in the values we found:
Fraction of blue mugs = 3 blue mugs / 15 total mugs

Simplifying this fraction:
Fraction of blue mugs = 1/5

Therefore, the fraction of mugs that are blue is 1/5.