AS & A Level Mathematics (9709) — May–June 2024, 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 20 values of x gives Σ(x − 30) = 439 and Σ(x − 30)^2 = 12405. A summary of another 25 values of x gives Σ(x − 30) = 470 and Σ(x − 30)^2 = 11346. Find the mean of all…
Answer this question and get it marked →The lengths of the tails of adult raccoons of a certain species are normally distributed with mean 28 cm and standard deviation 3.3 cm. Find the probability that a randomly chosen…
Answer this question and get it marked →The heights, in cm, of 200 adults in Barimba are summarised in the following table. Height (h cm) 130 ≤ h < 150 150 ≤ h < 160 160 ≤ h < 170 170 ≤ h < 175 175 ≤ h < 195 --- --- ---…
Answer this question and get it marked →A game for two players is played using a fair 4-sided dice with sides numbered 1, 2, 3 and 4. One turn consists of throwing the dice repeatedly up to a maximum of three times.…
Answer this question and get it marked →In a certain area in the Arctic the probability that it snows on any given day is 0.7, independent of all other days. Find the probability that in a week (7 days) it snows on at…
Answer this question and get it marked →Harry has three coins: - One coin is biased so that the probability of obtaining a head when it is thrown is 1/3. - The second coin is biased so that the probability of obtaining…
Answer this question and get it marked →The eight digits 1, 2, 2, 3, 4, 4, 4, 5 are arranged in a line. How many different arrangements are there of these 8 digits?
Answer this question and get it marked →