Brenda’s mice had 3 * 8 = <<3*8=24>>24 baby mice.

She gave Robbie 24 / 6 = <<24/6=4>>4 mice.

Thus, she sold 3 * 4 = <<3*4=12>>12 mice to the pet store.

She had 24 - 12 - 4 = <<24-12-4=8>>8 mice remaining.

She sold 8 / 2 = <<8/2=4>>4 as feeder mice.

Thus, Brenda had 8 - 4 = <<8-4=4>>4 mice left.

# Answer

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Brenda raises mice, and her adult mice recently had three litters of 8 each. She gave a sixth of the baby mice to her friend Robbie to keep as pets. She sold three times the number of babies she gave Robbie to a pet store. Half of the remaining mice were sold to snake owners as feeder mice. How many baby mice did Brenda have left?
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Brenda raises mice, and her adult mice recently had three litters of 8 each. She gave a sixth of the baby mice to her friend Robbie to keep as pets. She sold three times the number of babies she gave Robbie to a pet store. Half of the remaining mice were sold to snake owners as feeder mice. How many baby mice did Brenda have left?
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