Itook a test that has 25 questions. i scored 80 %. how many questions did i get wrong and how many did i get right?

20 good answers, 5 bad.

Step-by-step explanation:

100% - 25 questions

80% - x (correct answers)

x =

25 - x = 25 - 20 = 5 bad answers

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

hope this

use this formula:

p(a\b) = p(a and b)/p(b).

take it from here.