There are 15 marbles in a bag. 7 are red, the rest are a variety of colors. You want the chance of getting red to be at least 50%. How many red do you need to add?

1

Step-by-step explanation:

to get at least 50% you would have to add 1 more marble

hi there!

first we need to find out how much they are adding to each number to make the next number.

ex: 4 + 4 = 8, 8 + 8 = 16, and so on.

so continuing with 32,

32 + 32 = 64

64 + 64 = 128

128 + 128 = 256

256 + 256 = 512

4, 8, 16, 32, 64, 128, 256, 512

the 8th term of the sequence will be 512

hope this ! ~