Question

HELP PLEASE

Sandi made cookies for the teachers at her daughter's school. She made 20 sugar cookies and 18 chocolate cookies and put them in a box for the teacher's lounge. If one cookie broke, what is the probability it was a chocolate cookie?
A. 9/19
B. 1/18
C. 1/20
D. 19/21

Answer 1

Answer: A. 9/19

Explanation:

20 + 18(amount of cookies) = 38

there are 18 chocolate chip cookies, so it's an 18/38 chance it's a chocolate chip cookie that broke, but 18/38 can be simplified.

18 divided by 2 is 9 and 38 divided by 2 is 19

so 9/19