Foundation November 2021 Paper 2 Q11
11 Ali (A), Blake (B), Rowan (R) and Sam (S) are in a relay team.
Sam always runs fourth in the team.
The order for the other three is chosen at random.
(a) Complete this table to show all the possible orders for the team.
The first row has been completed for you.
You may not need to use all the rows.
The first row has been completed for you.
You may not need to use all the rows.
| First | Second | Third | Fourth |
|---|---|---|---|
| A | B | R | S |
[2]
(b) Find the probability that Ali will run first. [2]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| [A B R S] A R B S R A B S R B A S B R A S B A R S | 2 | B1 for at least 3 additional correct arrangements | For 2 marks no repeats or extras apart from A B R S |
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| \(\dfrac{2}{6}\) oe isw | 2 | FT their table M1 for correct numerator or denominator FT their table | For 2 marks or M1 denominator \(\lt 11\) Not ratio or words isw cancelling/conversion to other forms |