Question

A bag contains a no of marbles of which 80 are red 24 are white and the rest are blue. if the probability of randomly selecting a blue marble is 1/5 how many blue marbles are there in the bag?

Answer 1

here is your answer ...

no of blue marbles = no of fav Outcomes /total outcomes.

let total marbles be x

there fore blue marbles = x-104

putting in above formula..

x-104/x= 1/5

x = 5x -520

4x = 520

x = 520/4 = 130

therefore no of blue marbles....

130-104=26 answer....

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Answer 2

Answer:

Step-by-step explanation:

LET BLUE MARBLE = X

BLUE +RED+WHITE =TOTAL MARBLE

TOTA MARBLE=X+104

PROBABILITY OF BLUE = 1/5

X/X+104=1/5

5X= X+104

4X=104

X=26

BLUE MARBLES = 26

                            ANS

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