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a bag contains only red , yellow brown and green marbles
the probabilities of selecting each colour are below
red - 5x
green - 2x
brown - 3x
yellow - 4x
find the probability of selecting a yellow marble​


Sagot :

Answer:

  2/7

Step-by-step explanation:

The total of all probabilities of possible outcomes must be 1, so we require ...

  5x +2x +3x +4x = 1

  14x = 1 . . . . . . . . collect terms

  x = 1/14 . . . . . . . divide by 14

Then the probability of selecting a yellow marble is ...

  4x = 4(1/14) = 2/7

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