O-LevelMathematicsStatistics4024/11 · Oct/Nov 2021 · Q164 Marks
A 4-sided spinner numbered 1 to 4 is spun many times. The table shows the results of the spins. [Table: Number (1, 2, 3, 4), Frequency (6, 5, 13, p)]
- (a)The mean of the results is 3. Calculate the value of p.[3]
- (b)Find the relative frequency of the spinner landing on 2.[1]
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2021). The mark or mark type is shown in brackets.
- 16(a) 17 [3] M2 for (1×6+2×5+3×13+4p)/(6+5+13+p)=3 oe or M1 for either 1× 6 + 2 × 5 + 3 × 13 + 4p or for 3×(6+5+13+p)
- 16(b) 5/41 oe [1] FT 5/(24+their (a))
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