4MA0 Foundation January 2015 Paper 1 Q10
10 This formula can be used to work out the value, in pounds (£), of a number of shares in a water company.
Value of shares = 2.5 × number of shares
(a) Work out the value of 400 shares. (1)
The value of Elisha’s shares in the water company is £875
(b) Work out the number of shares that Elisha has. (2)
The value of \(n\) shares in the water company is £\(V\).
(c) Write down a formula for \(V\) in terms of \(n\). (2)
| Scheme | Marks |
|---|---|
| 1 000 | B1 |
| (1) |
| Scheme | Marks |
|---|---|
| \(\dfrac{875}{2.5}\) | M1 |
| 350 | A1 |
| (2) |
| Scheme | Marks |
|---|---|
| \(V = 2.5n\) | B2 |
| (2) | |
| (5 marks) |
Notes
B2: Accept \(V = 2.5 \times n\) oe
Award B1 for \(2.5n\) oe or \(n = V/2.5\)