To get the answer, multiple 20 by 0.45= $9 than subtract 9$ from $10 which equals $1.
To divide mixed number, convert to improper fractions and divide them
(a/b)/(c/d)=(a/b)(c/d)=(ac)/(bd)
to multiply fractions, multily top by top and bottom by bottom
(a/b)(c/d)=(a times c)/(b times d)
Evaluate the volume with the given measurements.
Answer: 376.8 m^3
Total marbles = 2 + 7 = 9
P(Purple, then white) = (7/9)(2/8) = 7/36
Answer: 7/36