AS & A Level Mathematics (9709) — May–June 2023, Paper 51
7 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →A summary of 50 values of x gives Σ(x − q) = 700 and Σ(x − q)^2 = 14235, where q is a constant. Find the standard deviation of these values of x.
Answer this question and get it marked →Find the number of ways in which a committee of 6 people can be chosen from 6 men and 8 women if it must include 3 men and 3 women.
Answer this question and get it marked →Find the number of different arrangements of the 8 letters in the word COCOONED.
Answer this question and get it marked →A mathematical puzzle is given to a large number of students. The times taken to complete the puzzle are normally distributed with mean 14.6 minutes and standard deviation 5.2…
Answer this question and get it marked →The populations of 150 villages in the UK, to the nearest hundred, are summarised in the table. Population 100 – 800 900 – 1200 1300 – 2000 2100 – 3200 3300 – 4800 --- --- --- ---…
Answer this question and get it marked →Eli has four fair 4-sided dice with sides labelled 1, 2, 3, 4. He throws all four dice at the same time. The random variable X denotes the number of 2s obtained. Show that P(X =…
Answer this question and get it marked →A children's wildlife magazine is published every Monday. For the next 12 weeks it will include a model animal as a free gift. There are five different models: tiger, leopard,…
Answer this question and get it marked →