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belka [17]
3 years ago
7

HELPP PLEASE DUE TOMMOROW PLEASE ANSWER QUESTION B

Mathematics
1 answer:
marin [14]3 years ago
4 0

Answer:

28 non-blue marbles.

Step-by-step explanation:

Initial probability of choosing a blue marble = 4/12

Let the number of non-blue marbles to be added be x.

\frac{4}{12+x} =\frac{1}{10}

12+x=40 (cross multiply)

x=28

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