Your question is a common one, but it sounds like your daughter is right on schedule. Children usually have 20 teeth in by the age of 3. However, there is a difference in timing from child to child. While we have general guidelines, there may be up to a year's difference between two children—and both are still considered within the range of normal eruption times.
Our parenting advice is given as suggestions only. We recommend you also consult your healthcare provider, and urge you to contact them immediately if your question is urgent or about a medical condition.