How Likely Is More Than Two Successes in Six Trials with 10% Success Rate?

[nachelle]

given trails n = 6, success probability p = 0.1

$$P(x > 2) = 1 - P(x \leq 2)$$
$$P(x \leq 2) = \left( \begin{array}{c} 8 \\ 0 \end{array} \right) 0.3^0 (1-0.3)^{8-0} + \cdots$$ (sum until x = 2, including that case)

help

 

[radou]

First, do not post same questions. Second, if you expect someone to solve the whole problem step by step (i.e. number by number), then you might be in the wrong forum. Third, without using your head, you won't solve any problem. Fourth, I'm not being rude.