selected at random from the shelf, find the probability that the book selected is a biography or reference book. (question)
a. 1/2
b. 1/6
c. 5/6
d. 3/50
2007-03-22 03:51:02 · 5 answers · asked by lana l 1 in Science & Mathematics ➔ Mathematics
Hi,
There are 10 books total on the shelf. Of those, 5 are either a biography or a reference book. Therefore, your odds are 5 out of 10, which reduces to 1/2, that that is what was selected.
Answer A
I hope that helps.
2007-03-22 03:56:51 · answer #1 · answered by Pi R Squared 7 · 2⤊ 0⤋
Total books = 4+3+1+2 = 10
Number of biograghy or reference books = 3 + 2 = 5
Chance of biography or reference book = 5/10 = 1/2
2007-03-22 10:57:11 · answer #2 · answered by Kenny 3 · 2⤊ 0⤋
there are 10 books in total on the bookshelf....
there are 3 biography books and 2 reference books...
combining the number of biography books and reference books and you get 5 books........
5 out of 10 is.........1/2
therefore 1/2 is your answer....
2007-03-22 10:58:42 · answer #3 · answered by Odane R 1 · 1⤊ 0⤋
it is 3(BIO) + 2(REF) = 5/ 10(4+3+2+1 total no of books) = 1/2
2007-03-22 11:10:14 · answer #4 · answered by sanjay 4 · 1⤊ 0⤋
I suck at math sorry
=D
2007-03-22 10:58:39 · answer #5 · answered by ♥Dancer♪ ♫♥ 2 · 1⤊ 1⤋