Explain why the term (62)p2(1−p)4\binom{6}{2}p^2(1-p)^4(26)p2(1−p)4 in the expansion of (p+(1−p))6(p+(1-p))^6(p+(1−p))6 gives the probability of exactly two successes in six independent trials.
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2.7 Statistical distributions Questions
39 exam-style questions on CCEA A Level Maths 2.7 Statistical distributions, covering 2.7.1 Statistical distributions and 2.7.2 Statistical distributions. Each one has a worked solution and a mark scheme showing where the marks go.