Sunny, try one and see how you do, then add two. Give yourself a week in between to figure out if it's really working.
At the beginning of my Phase 2, my DH's grandfather died and we traveled to the funeral. To make my life easier, I just ate the amount of fruits and starches (easier to say than carbs as it keeps people from freaking out over the idea of you eating one gram of carbs when you say "one carb"...

) from the book, which was three fruits and two starches, I think. I still lost, but I wasn't eating much with the funeral.
After I got back, I started gaining, so over time I reduced the number of fruits and starches to one each a day. I've played with it over time, reducing further or adding an extra one, and neither works for me. One of each is exactly what I need to lose and stay motivated.
Each person is different, so play with your intake until you figure out the right thing for you.