Question

Gabby needed to type up 12 documents during the week. By Wednesday, she only finished 3 1/5 documents. On Thursday, she finished another 5 3/4 documents. If she finished writing all documents by Friday, how much did she write on Friday?

Answer 1

Answer: She wrote
`3(1)/(20)` documents on Friday.

Explanation:

GIven: Total documents needed to be done = 12

If she finished writing all documents by Friday, then the number of documents written on Friday = 12-(work done by Wednesday) - (work done on Thursday)

`= 12 -(3\frac15)-(5\frac34)\\\\=12-(16)/(5)-(23)/(4)\\\\=(12*20-16*4-23*5)/(20)\\\\=(240-64-115)/(20)\\\\=(61)/(20)\\\\=3(1)/(20)`

Hence, She wrote
`3(1)/(20)` documents on Friday.