A shop needs to mail 77 checks to the bank if they put 4checks in each envelope how many checks will be in the final envelope
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Since every female chicken lays 4 eggs, if you have one chicken you have 4 eggs, if you have two chicken you have 8 eggs, and so on.
We can even build a little table to show some values:
So, as you can see, the ratio between the number of eggs and the number of female chicken is 4.