Fred has two pens (red and green). he wants to write the word "yes" and "no" with both pens. in how many ways can he write both words with both pens?

Since there are 2 pens and 2 words, you have to multiply. 2×2=4. Good luck!

I believe the answer is 16. YES is 3 letters. 1) green all letter 2) green, green, red 3) green, red, green 4) red, green, green 5) red for all 6) red, red, green 7) red, green, red 8) green, red, red. Now "NO" has 2 letters, so he can write any way of "YES" with 2 combinations of "NO"{1) green, red 2) red, green)} so multiply 8 by 2 to get the final answer of 16.

20 percentage, you can also do it on a calculator.