Joan's stamp collection consists of three books. Two tenths of her stamps are in the first book, several sevenths are in the second, and there are 303 stamps in the third book. How many stamps are there in Joan's collection?
+947
Joan's stamp collection consists of three books. Two tenths of her stamps are in the first book, several sevenths are in the second, and there are 303 stamps in the third book. How many stamps are there in Joan's collection?
Ditto Sportzin #1. 2/10 in the 1st book & 7/10 in the 2nd book,
that takes care of 9/10 of the total, leaving 1/10 in the 3rd book.
The problem is weirdly stated, and requires thought to make sense.
.
S==stamps
S - (0.2S + (t/7)S ==303, solve for S
S ==10605 / [28 - 5t]
Let t ==5
S==10605 / 3
S ==3,535 stamps in her 3 books
2/10 x 3535 ==707 stamps in her 1st book
5/7 x 3535 ==2525 stamps in her 2nd book.
And 303 stamps in her 3rd book.
Total ==707 + 2525 + 303 ==3,535 stamps in her collection.
