Bob has 120 beads
The beads are either red or green
Bob gives 3/4 of the beads to his friend
2/3 of the beads bob now had are red
Work out how many green beads bob now has

Question

22-02-2015
Mathematics

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Bob has 120 beads
The beads are either red or green
Bob gives 3/4 of the beads to his friend
2/3 of the beads bob now had are red
Work out how many green beads bob now has

Sagot :

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Анонимidn Анонимidn · Answer 1 · 2015-02-22T14:48:05-05:00

Bob has 10 green beads you can show this by dividing 120 by 4 and that then leaves 30 beads which is 1/4 of the original amount of beads. Now knowing that Bob has 30 beads you put it into an equation with x over 30 equal to 2/3 that then makes you able to see that if you multiple the denominator by 10 you get 30 so you do the same to the numerator causing x to be 20 and that is the amount of the red beads leaving 10 beads to be green.

Sagot :

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