For one toss of a certain coin, the probability that the outcome is heads is 0.6. If this coin is tossed 5 times, which of the following is the probability that the outcome will be heads at least 4 times?
~$0.6^{5}$~
~$2\left ( 0.6 \right )^{4}$~
~$3\left ( 0.6 \right )^{4}\left ( 0.4 \right )$~
~$4\left ( 0.6 \right )^{4}\left ( 0.4 \right )+\left ( 0.6 \right )^{5}$~
~$5\left ( 0.6 \right )^{4}\left ( 0.4 \right )+\left ( 0.6 \right )^{5}$~
四枚硬币heads + 五枚硬币heads=C^1 5* (0.6)^4 X 0.4 + (0.6)^5
登录 或 注册 后可以参加讨论