In a bag are blue green and red marbles. 50% are blue and thirty percent are green. there are 6 red marbles in the bag. if you increase the number of blue marbles by 40%, how many blue marbles will be in the bag

There will be 21 blue marbles

Step-by-step explanation:

In a bag are blue, green and red marbles. Let x be the number of all marbles in the bag.

50% of all marbles are blue. 50% is exactly half of the marbles, so there are blue marbles.

30% of all marbles are green, so there are green marbles.

The rest marbles are red marbles, so there are red marbles.

There are 6 red marbles in the bag, thus

Hence, there are

If you increase the number of blue marbles by 40%, then

15 - 100%

x - 140% (increased by 40%)

Write a proportion:

Cross multiply:

i dont know

step-by-step explanation: