Just add all the numbers together. You have two options of adding as a decimal or adding as a fraction. I'll do the decimal. First, change all the fractions to the decimals. So 3 3/4 = 3.75, and 2 1/2 = 2.5
Then add the numbers: 3.75+3+2.5 = 9.25 = 9 1/4 so the answer is B