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16-20 ben collects marbles and keeps in a box, 3/10 of the marbles in a box are red and 2/5 of them are blue. if 9/10 of the Marbles in a box are red, blue and green, what fraction of the marbles are green?
what are given?16-17.
what is asked?18.
what operation to be use?19.
solution:20.
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YHAELMARTIJA9IN

Answer:

16 - 17.

3/10 are red marble

2/5 are blue marble

9/10 red blue and green marbles

18.

what fraction of marbles is green

19.

Addition then Subtraction

20.

3/10 + 2/5 = 3/10 + 4/10 = 7/10

then subtract 7/10 from 9/10

9/10 - 7/10 = 2/10 ; 1/5 in simplest form

1/5 in box are green marble

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