ANSWER
1,440
Step-by-step explanation
We have that 4 boys are competing and also 5 girls are competing. 3 medals are given to the boys and 3 medals are given to the girls.
For the boys, the gold medal can be awarded to one of 4 boys, then the silver medal can be awarded to 3 boys because 1 of them already got the gold medal. Finally, the bronze medal can be awarded to one of 2 boys, since the gold and silver medals are already taken. The number of ways the medals can be given to the boys is,
This situation is similar for the girls, but in this case, there are 5 girls in total,
The total ways the six medals can be given is,
Hence, there are 1,440 ways to give the six medals to the 4 boys and 5 girls.