In a tree, 3/7 of the birds are parrots while the rest are toucans. If 2/3 of the parrots are female and 7/10 of the toucans are female, what fraction of the birds in the tree are male?	Choose the correct choice from the following answers
A) 3/7	B) 11/35	C) 16/35	D) 31/70	E) 37/70
Let x be the number of birds in the tree.   The fraction of birds that are male parrots is (1/3)(3/7)=1/7.   The fraction of birds that are male toucans is (3/10)(4/7)=6/35.   The total fraction of male birds is 1/7 + 6/35 = 11/35.   The answer is 11/35.
<result>B</result>
In a tree, 3/7 of the birds are parrots while the rest are toucans. If 2/3 of the parrots are female and 7/10 of the toucans are female, what fraction of the birds in the tree are male?