Question 1099494
<br>I will assume that, since the problem says there is a large number of marbles in the bag, it means we can consider the probability of getting a red marble on the later choices is still 40%.<br>
Three red marbles in four choices can happen in four different ways: RRRG, RRGR, RGRR, or GRRR.<br>
The probability for each of those cases is {{{(0.6)(0.6)(0.6)(0.4) = 0.0384}}}.
So the probability of getting 3 reds in 4 choices is {{{4*0.0384 = 0.1536}}}<br>