Skip to content

Course home

2.4.4 Mean and variance of the binomial (A-level only)

In X∼B⁡(n,p)X\sim\operatorname{B}(n,p)X∼B(n,p), what does XXX count?

A

A common normal-approximation check is that both npnpnp and nqnqnq are at least 5.

B

p=0.5p=0.5p=0.5, when success and failure are equally likely.

C

nqnqnq.

D

The number of successes in nnn trials.

2.4.4 Mean and variance of the binomial (A-level only) Flashcards

  1. A Level
  2. /Maths
  3. /2.4.4 Mean and variance of the binomial (A-level only)

Flashcards for OCR A Level Maths 2.4.4 Mean and variance of the binomial (A-level only), covering the key formulae, methods and definitions you need to recall for Paper 1, Paper 2 and Paper 3. 21 cards, matched to the OCR A Level Maths (H240) specification. Recall questions account for roughly 50% of marks at A Level Maths, so these target the marks you can secure before the paper starts.