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Q14: Answers – Paper 2 – June 2019
Q14: Answers – Paper 2 – June 2019
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Ali and Mel are making 3-digit codes.
The digit 0 is not used.
a) Ali can make x more codes than Mel.
Assume that digits cannot be repeated.
Work out the value of x.
Ali and Mel are making 3-digit codes.
The digit 0 is not used.
- Ali only uses odd digits.
- Mel only uses even digits.
a) Ali can make x more codes than Mel.
Assume that digits cannot be repeated.
Work out the value of x.
b) In fact, digits can be repeated.
What does this tell you about the actual value of x?
Tick one box.
Question
14)
Ali and Mel are making 3-digit codes.
The digit 0 is not used.
a) Ali can make x more codes than Mel.
Assume that digits cannot be repeated.
Work out the value of x.
Ali and Mel are making 3-digit codes.
The digit 0 is not used.
- Ali only uses odd digits.
- Mel only uses even digits.
a) Ali can make x more codes than Mel.
Assume that digits cannot be repeated.
Work out the value of x.
[3 marks]
b) In fact, digits can be repeated.
What does this tell you about the actual value of x?
Tick one box.
[1 mark]