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AS Unit 2 Applied Mathematics A

Quick questions on Statistical distributions: the binomial distribution - WJEC A-Level Maths

4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What are discrete random variables?
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A discrete random variable XX takes a countable set of values, and a probability distribution lists each value with its probability.
What is q1?
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State the four conditions for a binomial distribution. [2 marks]
What is q2?
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X∼B(6,0.5)X \sim B(6, 0.5). Find P(X=6)P(X = 6). [2 marks]
What is q3?
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X∼B(15,0.2)X \sim B(15, 0.2). Find the mean of XX. [1 mark]

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