There are 9 boys and 12 girls in a class. The teacher needs to create groups with three members for their class activity. How many groups are formed?
There are 9 + 12 = <<9+12=21>>21 students in a class.
Hence, 21/3 = <<21/3=7>>7 groups are formed.
#### 7
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
You are solving math problems. Here are some examples of how to solve the task:

Pirate Rick sailed his ship to a tropical island in search of a site to bury his treasure.  After finding the perfect site, it took him 4 hours to dig up 8 feet of sand under which to bury the treasure.  Once the treasure was buried, he left the island.  Then, a tropical storm came and washed away half of the sand from on top of the treasure.  Next, a giant tsunami wave poured over the island, adding 2 feet of new sand back onto the site of his treasure. When Pirate Rick returned, how long did it take for him to dig up his treasure?Pirate Rick digs at a rate of 8 feet of sand per 4 hours, or 8/4=<<8/4=2>>2 feet per hour.
Of the 8 feet of sand that were initially on top of the treasure, the storm washed 8/2=<<8/2=4>>4 feet of sand away.
Thus, after the storm and the tsunami, the treasure was buried beneath 8-4+2=<<8-4+2=6>>6 feet of sand.
Digging at a rate of 2 feet per hour, Pirate Rick could uncover his treasure in 6/2=3 hours.
#### 3[END]

The bowl of fruit contains apples, pears, and bananas. There are two more pears than apples, and three more bananas than pears.  If the bowl contains 19 pieces of fruit, how many bananas does it contain?Let A be the number of apples.
There are A+2 pears.
There are (A+2)+3 pears.
Then A+(A+2)+((A+2)+3)=19.
3A+7=19
3A=12
A=4
There are 4 apples.
There are (4+2)+3=<<4+2+3=9>>9 bananas.
#### 9[END]

Now, solve this next question in the style of the above examples:

There are 9 boys and 12 girls in a class. The teacher needs to create groups with three members for their class activity. How many groups are formed?

### Response:
There are 9 + 12 = <<9+12=21>>21 students in a class.
Hence, 21/3 = <<21/3=7>>7 groups are formed.
#### 7