Mathematics · Oct / Nov 2023 · Paper 42 · Question 3
0580
As printed in the paper
Show the answer and mark scheme
3(a)(i)[2]
6925.5[0] cao [2]
− 2
M1 for 7695 × 100 10 oe 100
or B1 for answer 769.5
3(a)(ii)[2]
8550 [1]
− 2
M1 for 100 10 × = X 7695 oe 100
3(b)[3]
660 [3]
B2 for 60 ××
or M2 for 600 + 600 2 5 oe 100 × ×
or M1 for 600 2[ 5] oe 100
3(c)[3]
1.55 or 1.549 to 1.550 [3]
M2 for 12 601.35 500
or M1 for × 12 = 500 (...) 601.35
3(d)(i)[2]
26.3 or 26.25 to 26.26 [2]
− 10 100 3
M1 for [k] oe 100
3(d)(ii)[3]
23 [3]
M2 for a correct trial evaluated with n =22 or n = 23
or M1 for [k] (0.97)n < 0.5[k] oe soi or for [k](0.97)n = 0.5[k] oe soi, implied by one correct trial n > 10 or for [k](0.97)23 oe seen If 0 scored
SC1 for answer 22
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