Roberto has a bag that contains 7 blue, 5 purple, 12 red, and 6 orange marbles. If he draws one marble at random from the bag, what is the probability of selecting a RED or ORANGE marble?

I'm giving you 3 different answers because I don't know if you need it as a fraction, decimal, or percent

7 + 5 + 12 + 6 = 30

12 + 6 = 18

18/30

simplify

18 / 2 = 9

30 / 2 = 15

9/15

change to a decimal

9 / 15 = .6

change to a percent

.6 x 100 = 60%

step-by-step explanation:

we can use this expression to calculate the energy gain as a particle moves with a field or the energy loss as it moves against it. (note that it is also used to define the electron-volt, a unit of energy equal to that gained by an electron as it falls through a pd of 1 v, i.e. w = 1 ev = 1.6 10-19 c 1 v = 1.6 10-19j).in fact this expression is really nothing more than the statement that potential is the potential energy per unit charge. in this case, v= w/qis simply stating that the change in potential energy(or work done) per unit charge is equal to the change in potential (or potential difference), v.student questions: uniform electric fields2electron beamcathode+5 kvanode0 v

answer: 270

step-by-step explanation:

you have to times 200 by 1.35 to get your answer