Harry has 50 books in his library. His sister Flora has twice as many books and their cousin Gary has half the books Harry has. How many books do the three of them own together?
How many books does Flora have? ** Flora has 50*2= <<50*2=100>>100 books
How many books does Gary have? ** Gary has 50/2= <<50/2=25>>25 books
How many books do the three of them own together? ** Together they own 100+25+50= <<100+25+50=175>>175 books
#### 175