101. A hen hatches 5 eggs. Out of 5, few are female while other are male. Out of these, few hens again hatch two eggs (one male, one female) while other hens hatch one egg (only male). If there are 7 females total and 5 males overall, find number of hens which hatch only single egg.
Start with one hen
She lays 5 eggs, 2 roosters , 3 hens
The three hens each lay two eggs, three more hens, three more roosters
the total number of hens is 1+3+3=7
the total number of roosters is 2+3=5
so no hen lays a single egg.