Below is an instruction that describes a task. Write a response that appropriately completes the request in Thai. Please answer in Thai.

### Instruction:
Robby doesn't like the color brown and will not eat the brown M&M's.  On his first bag, he sets aside  9 brown M&M's.  On the second bag, he sets aside 12.  On his third & fourth bag, there are 8 brown M&M's that he doesn't eat. On his fifth bag, there are only 3 brown M&M's that he doesn't eat.  What's the average number of brown M&M's in a bag?

### Response:
 ใน 5 ถุง เขามี M&M's สีน้ำตาลทั้งหมด 9+12+8+8+3 = <<9+12+8+8+3=40>>40 ลูก
เขากิน 5 ถุงดังนั้น จำนวนเฉลี่ยของ M&M's สีน้ำตาลต่อถุงคือ 40/5 = <<40/5=8>>8 ลูก M&M's สีน้ำตาล