Question

nitin has 54 marbles which are while,blue and black.the ratio of white ,blue and black marble is 3:1:2.find probability of a marble which is not white
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Answer 1

Answer:

1/2

Step-by-step explanation:

The sum of ratio is 3+1+2=6

The ratio in which white is not the outcome is 2+1=3

Probability = No. of outcome / Total Outcome

=3/6

=1/2

Answer 2

Answer:

27/54

Step-by-step explanation:

Let the no. of white blue and black marbles be 3x , x and 2x respectively.

Now, 3x+x+2x= 6x

54 =6x

54/6= X

Therefore X= 9

Therefore,. No.of blue marbles= X= 9

No.of black marbles = 2x

=2×9 =18

Total no of marbles that are not white = 18+9= 27

Hence, Probablity of a marble which is not white = 27/54

= 1/2

Hope it helps.