O-LevelMathematicsProbability4024/12 · Oct/Nov 2022 · Q113 Marks
Azra has a spinner. The sections are coloured red, blue, yellow or green. The relative frequency of the spinner landing on red, blue or yellow is shown in the table. [Table with Colour on spinner (Red, Blue, Yellow, Green) and Relative frequency (0.15, 0.3, 0.2, <empty>)]
- (a)Find the relative frequency of the spinner landing on green.[2]
- (b)Azra spins the spinner 150 times. How many times would she expect the spinner to land on blue?[1]
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2022). The mark or mark type is shown in brackets.
- [2] 0.35 oe
- M1 for 1 - (0.15 + 0.3 + 0.2) oe or B1 for 0.65 oe seen
- [1] 45
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