For one toss of a certain coin, the probability that the outcome is heads is 0.6. If the coin is tossed 5 times, which of the following is the probability that the outcome will be at least 4 times?
A) (0.6)^5
B) 2(0.6)^4
C) 3(0.6)^4(0.4)
D) 4(0.6)^4(0.4) * (0.6)^5
E) 5(0.6)^4(0.4) + (0.6)^5
from GMAT PREP
A) (0.6)^5
B) 2(0.6)^4
C) 3(0.6)^4(0.4)
D) 4(0.6)^4(0.4) * (0.6)^5
E) 5(0.6)^4(0.4) + (0.6)^5
from GMAT PREP
