A bag contains 60 marbles, some blue and some white. The ratio of blue marbles to white ones is 4 : 2. How many white marbles are there?

There are 20 white marbles.

Step-by-step explanation:

Since the ratio is 4 : 2, there could be 40 blue : 20 white

This is possible because 40: 20  is the same as 4:2 and 40 + 20 equals 60 marbles total.

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20

Step-by-step explanation:add the ratio

(2/6)×60

i got 10.28 but that rounds up to 10.3

the simplified form is

step-by-step explanation:

we want to simplify the expression,

let us change the middle bar to a normal division sign to obtain,

we multiply the first fraction by the reciprocal of the second fraction to obtain,

we factor to obtain,

we cancel the common factors to get,

we simplify to get,

the correct answer is b