Answer:
for 7 its b and for 8 its C becuase i took this test and got it right
Step-by-step explanation:
It is 20
Prime factorisation
2/4,5,10
2/2,5,5
5/1,1,1
2×2×5=20
That’s a good question for google haha
C
Black = 200 x 0.19 = 38
White = 200 x 0.12 = 24