Although some of the things in this problem aren't true in real life just assume they are in the question.
When growing peanuts the following happens:
for every 2 single chambered peanuts there will be one double chambered peanut
for every 2 double chambered peanuts there will be one triple chambered peanut
for every 2 triple chambered peanuts there will be one quadruple chambered peanut.
When a company packages 1000 peanuts in one bag they take peanuts randomly from a giant bin that contins all the peanuts grown. What are the odds that there will be 1000 individual nuts?
The probability is approximately 0.1814.