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Q5: Question – Paper 2– June 2017
Q5: Question – Paper 2– June 2017
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Question
5)
A code has 4 digits.
Each digit is a number from 0 to 9
Digits may be repeated.
The code starts 5 4 1
A code has 4 digits.
Each digit is a number from 0 to 9
Digits may be repeated.
The code starts 5 4 1
a) Amy knows the last digit is odd but not 7
She chooses a different odd number at random.
What is the probability that she chooses the correct number?
She chooses a different odd number at random.
What is the probability that she chooses the correct number?
[1 mark]
b) The 4-digit code is changed to an even number.
The first digit is 3
How many possible codes are there?
[2 marks]