Abag contains 3 green marbles, 7 blue marbles and 2 black marbles. the probability of randomly picking a green marble is 1/4. what is the probability of not picking a green marble. show your work.

The probability of not picking a green is 3/4. To get this answer you would add up the blue and black marbles, giving you an answer of 9. You would then put 9 over 12, which simplified would equal 3/4. Another way to find the answer is to take 1 and subtract 1/4 because 1/4 is the probability of green marbles. Hope this helps :) 

Just tell koda to adjust the number of shapes himself.

Yes, that is the correct formula. to solve this problem given the number of years, plug in the number of years for t and plug the whole thing into the