Ajar contains 75 marbles. 2/5 of the marbles are black. what fraction of the marbles are black, using 75 as the denominator

75 x 2/5 = 150/5 = 30

30/75 are black

Step-by-step explanation:

Given : A jar contains 75 marbles.

             2/5 of the marbles are black.

To Find : What fraction of the marbles are black, using 75 as the denominator

Solution:

Total marbles = 75

2/5 of the marbles are black.

No. of black marbles =

                                  =

So,  fraction of the marbles are black, using 75 as the denominator =

the image of (6, 9) under a dilation is (4, 6). the scale factor is

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

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