P1 (dep P1) for complete process × (1 0.55) oe “0.2” – A1 oe 21 (a) M1 for correct substitution A1 oe (b) 2 or 3 B1 for 2 or 3 (c) M1 for representing the equation as a single fraction M1 for simplifying and rearranging to a quadratic equal to zero A1 for M1 for a complete method to solve their quadratic A1 oe
P1 A1 (dep P1) for complete process “0.2” × (1 – 0.55) oe oe 21 (a) M1 A1 for correct substitution oe (b) 2 or 3 B1 for 2 or 3 (c) M1 M1 A1 M1 A1 for representing the equation as a single fraction for simplifying and rearranging to a quadratic equal to zero for for a complete method to solve their quadratic oe
gcse_1ma1_mark_scheme_3h__mock_set_2_.docx