Answer:
It is 20 white marbles
step by step explanation:
Fraction of the yellow marbles:
[tex]1 - \frac{1}{4} - \frac{3}{8} = \frac{3}{8} [/tex]
let total number of marbles be x :
[tex]{ \sf{ \frac{3}{8} \: of \: x = 30 \: yellow \: marbles}} \\ \\ \frac{3}{8} \times x = 30 \\ \\ 3x = 30 \times 8 \\ 3x = 240 \\ x = 80[/tex]
Total marbles = 80 marbles
for white marbles:
[tex] = \frac{1}{4} \times 80 \\ \\ = 20[/tex]
