Moderate -0.3 This is a straightforward partial fractions question with a linear factor and an irreducible quadratic factor. It requires standard technique (setting up the form A/(2-x) + (Bx+C)/(4+x²) and solving for coefficients) but involves no problem-solving or conceptual difficulty beyond routine application of the method taught in C4.
Question 1:
--- 1 (i) ---
1 (i) | Group P Q R S
Number of people 15
Average number of accidents in a year 4.5
Average cost of accidents per year £7500 £9000
Group | P | Q | R | S
Number of people | 15
Average number of accidents in a year | 4.5
Average cost of accidents per year | £7500 | £9000
--- 1 (ii) ---
1 (ii)
--- 1 (iii) ---
1 (iii)