Level:
Project ID:
1003034503
Source Problem:
Accepted:
1
Clonable:
1
Easy:
0
Students registered for sports camps. For the biking camp registered by \( 18 \) students more than for the boating camp. After some time one of the students switched his registration from the boating camp to the biking camp. Now, there is two times more bikers than boaters. How many students registered originally for the boating camp?
\( 21 \)
\( 39 \)
\( 20 \)
\( 15 \)