Question

A particular brand of shirt comes in 12 colors, has a male size version and a female version, and comes in three sizes for each sex. How many different types of this shirt are made?

Answer 1

Solution:

Let's denote given numbers:

$C=12$ - numbers of color;

$S=3$ - numbers of sizes;

If each size has 12 color, for male and female, so total numbers of different types:

$N=2CS=2\times12\times3=72;$

Answer:

$N=72$ -different types.