Question

plz answer fast it is urrgent
jaldi da do answer​

Answer 1

Answer:

10:3:12

calcium=10

carbon=3

oxygen=12

total=10+3+12=25

cardon%=?

so,

   3multiply by 100/25

3 multiply by 4 because 25 4 sa 100

so carbon is 12%

please like it if help full

Answer 2

Percentage of carbon in chalk

$= \frac{3}{10 + 3 + 12} \times 10 0 \\ = \frac{3}{25} \times 100 \\ =3 \times 4 \\ = 12$