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Q16: Question – Paper 1 – June 2019
Q16: Question – Paper 1 – June 2019
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Question
16)
There are three dials on a combination lock.
Each dial can be set to one of the numbers 1, 2, 3, 4, 5
The three digit number 553 is one way the dials can be set, as shown in the diagram.
There are three dials on a combination lock.
Each dial can be set to one of the numbers 1, 2, 3, 4, 5
The three digit number 553 is one way the dials can be set, as shown in the diagram.
a) Work out the number of different three digit numbers that can be set for the combination lock.
[2 marks]
b) How many of the possible three digit numbers have three different digits?
[2 marks]