There are 3 green marbles, 7 red marbles and 5 white marbles in a bag. Find the probability of the chosen marble being either red or white.

Jonah runs 3/5 miles on sunday and 7/10 mile on monday. he uses the model to find that he can ran a total of 1 mile . what mistake does jonah make

Twelve less than a number is at most 20

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible