SOLUTION: At the start of the week a bookshop had science and art books in the ratio 2 to 5. By the end of the week, 20% of each type of books were sold and 2240 book of both type were unsol

Question 1093862: At the start of the week a bookshop had science and art books in the ratio 2 to 5. By the end of the week, 20% of each type of books were sold and 2240 book of both type were unsold. How many books of each type were at the start of the week.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
At the start of the week a bookshop had science and art books in the ratio 2 to 5. By the end of the week, 20% of each type of books were sold and 2240 book of both type were unsold. How many books of each type were at the start of the week.
----
Start DATA:
# of science books = 2x ; # of art books = 5x ; Total books = 7x
------------------------
Equation::
0.8(2x) + 0.8(5x) = 2240
0.8(7x) = 2240
x = 400
-----------------
Ans:: 7x = 7*400 = 2800 books at start of week
------------
Cheers,
Stan H.
----------
RELATED QUESTIONS
at the start of the week a bookshop has science and art books in the ratio 2:5. If there... (answered by josgarithmetic,greenestamps)

At the beginning of the week, linda had 41 books. Shed bought 12 books and sold 17 books. (answered by ikleyn)

Tennis player computes her win ratio by number of matches won divided by number of total... (answered by josmiceli)

for a science project a class measures the height of a plant at the end of each week for... (answered by JBarnum)

Jaycee is collecting aluminum cans. She collects the same amount of cans each week.... (answered by KMST)

The ratio of men to women at Caloocan collage of science and art is 7to 5.how many women... (answered by Cromlix)

A media company wishes to keep misinformation from spreading. Suppose a rumour increase... (answered by ikleyn)

Find the probability of selecting 5 science books and 3 math books from science books... (answered by ikleyn)

Over a three week period, the price of an gram of gold increased by 25% in the first... (answered by Theo,skippo)