Answer:
[tex] \frac{1}{10} [/tex]
Step-by-step explanation:
Red
[tex] \frac{2}{5} [/tex]
blue
[tex] \frac{1}{8} [/tex]
green
[tex] \frac{3}{8} [/tex]
first, make denominators same.
*The common LCM we choose is 40*
RED
[tex] \frac{2}{5} \times 8 = \frac{16}{40} [/tex]
BLUE
[tex] \frac{1}{8} \times 5 = \frac{5}{40} [/tex]
GREEN
[tex] \frac{3}{8} \times 5 = \frac{15}{40} [/tex]
Yellow marble:-
RED+GREEN+BLUE =
[tex] \frac{16}{40} + \frac{5}{40} + \frac{15}{40} = \frac{36}{40} [/tex]
Yellow marble = total marbles-sum of other marble colours
*note that the total no. marbles are 40*
[tex] \frac{40}{40} - \frac{36}{40} = \frac{4}{40} [/tex]
*you can leave it in this form or you can simplify it*
[tex] \frac{4}{40} or \frac{1}{10} [/tex]
