O-LevelMathematicsProbability4024/21 · May/June 2017 · Q35 Marks
Humanities: Geography (G) History (H) Religious studies (R) Science: Physics (P) Chemistry (C) Biology (B) A student has to choose one humanities subject and two different science subjects.
- (a)Complete the table to show the possible outcomes. Answer Humanities Science G P and C G P and B[2]
- (b)(i)Find the probability that he chooses Geography.[1]
- (b)(ii)Find the probability that he chooses Physics.[1]
- (b)(iii)Find the probability that he chooses both Religious studies and Chemistry.[1]
Mark scheme
Marking points from the official mark scheme (May/June 2017). The mark or mark type is shown in brackets.
- [2] GCB, HPC, HPB, HCB, RPC, RPB, RCB
- [1] B1 for 5 correct and none incorrect or for 6 correct
- [1] 1/3 or 0.333(..) or 33.3(..)[%]
- [1] FT dep on B1 scored in (a)
- [1] 2/3 or 0.666-0.667 or 66.6% – 66.7%
- [1] FT dep on B1 scored in (a)
- [1] 2/9 or 0.222(...) or 22.2(...)[%]
- [1] FT dep on B1 scored in (a)
- After 0 scored in (i) (ii) and (iii), SC1 for 3 6 2 / k k k
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