Question

A bag contains 12 red marbles. The ratio of red marbles to blue marbles is 4 : 3. Find the number of blue marbles in the bag.

Answer 1

Answer:

multiply x to 4 and 3

given

4x= 12

therefore x=3

therefore 3 multiplied by 3 gives 9

9 is the answer

Step-by-step explanation:

Answer 2

Answer:

The number of blue marbles in the bag are $n_{b}=9$

Step-by-step explanation:

Given that,

The number of red marbles in the bag is $n_{r}=12$ and

The ratio of the number of red marbles to blue marbles in the bag is $4:3$

Hence, we can write it mathematically as

$\frac{n_{r}}{n_{b}}=\frac{4}{3}$

To find the blue marbles we substitute the given data in the above relation as shown below

$\frac{12}{n_{b}}=\frac{4}{3}= > n_{b}=9$

Therefore,

The number of blue marbles in the bag are $n_{b}=9$

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