3. A teacher is taking twelve students to plant trees, with a total of 44 saplings. The teacher carries 6 saplings, each boy carries 4 saplings, and each girl carries 2 saplings. There are $\qquad$ girls.
【Analysis】12 students carried a total of 38 saplings. If all 12 students were boys, they could carry 48 saplings, which is 10 more than the actual number. Now, let's start replacing. Replacing 1 boy with a girl results in 2 fewer saplings being carried. Since a total of 10 fewer saplings are needed, there are $10 \div 2=5$ girls.