Find the ratio of a to b
c/3d=a/e and c/d=b/e
Thank you :)

Step-by-step explanation

1.  

a = 0, b = 0, e!=0

3 a - b c d!=0, e = (3 a)/(3 a - b c d), a!=0

a = 0, b!=0, c = 0, e!=0

a = 0, b c!=0, d = 0, e!=0

2.

b = 0, c = 0, d!=0

b!=0, d = (e c)/b, c!=0

Some solutions I think they are right not sure tho :D

15%

step-by-step explanation:

use the table and count the number of guesses that has two correct answers.

the following are two correct answers

10010, 01100, 11000

a total of 3 numbers having 2 correct guesses out of 20 questions.

probability of getting 2 correct guesses = the number of questions getting 2 correct answers / total number of questions.

= 3/20

to convert it into percent multiply by 100, we get

= 3/20 * 100

= 15%

the answer is 15%

you.