A bag contains 16 red marbles, 7 yellow marbles, and 19 green marbles. how many additional red marbles must be added to the 42 marbles already in the bag so that the probability of randomly drawing a red marble is 3/5

The number of red marble to be added in box is .

Step-by-step explanation:

Given that,

Number of red marbles  =

Number of yellow marbles =  

Number of green marbles =

Total number of marbles in the bag =

So,

Let the number of red marbles to be added in bag is .

Then Required probability of random drawing a red marble is .

Here,  New number of red marbles is

And total number of marbles be

∴                

⇒                            

Cross- multiplying we get,

⇒                          

⇒                            

⇒                                    

⇒                                    

thus , the new number of marble to be added in bag is

And total number of marble in bag become .

Hence, The number of red marble to be added in box is .

opened, 2, to the left

Step-by-step explanation:

The circle is opened because it has to be less than no equal to and it goes to the left because the answers have to be less than to solution. The dot is on 2 because you have to isolate x.

6x - 4 < 8

6x < 12

x<2