Mathematics · Oct / Nov 2021 · Paper 42 · Question 2
0580
As printed in the paper
Show the answer and mark scheme
2(a)(i)[1]
90 [1]
2(a)(ii)[1]
68 [1]
2(a)(iii)[1]
52 [1]
FT 120 – their (a)(ii)
2(a)(iv)[2]
20 [2]
B1 for 60 in working or as answer
2(b)(i)[4]
97.5 [4]
M1 for mid-points soi (50, 70, 90, 115, 145, 180)
M1 for use of Σfm with m in correct interval including both boundaries
M1 for (dep on 2nd M1) for Σfm ÷ 80
2(b)(ii)[4]
Bars with heights 0.9, 0.5, 0.3, 0.175 and with correct widths [4]
B1 for each correct bar If 0 scored,
SC1 for 3 or 4 correct frequency densities
2(b)(iii)[3]
28 395 oe [3]
M2 for [2 ×] 16 14 × oe 80 79
or M1 for 16 80 or 16 79 oe or 14 80 oe or 14 79 oe seen If 0 scored,
SC1 for answer 7 100 oe
Make a free account to save your answers and see your weak topics and ask the AI why a wrong answer is wrong.