Foundation June 2023 Paper 2 Q12

OCRFoundationCurrent spec3 marksCombinations

12 Sasha is trying to remember a 4-digit pin number.

Sasha knows it has the following digits and that the first digit is 9.

\[\boxed{9} \qquad \boxed{3} \qquad \boxed{2} \qquad \boxed{7}\]
(a) Write down all of the possible orders for Sasha’s 4-digit pin number. [2]
(b) Sasha tries one of these orders at random.

Write down the probability that the last digit of the pin number that Sasha tries is 2. [1]