4MA0 Higher January 2016 Paper 4 Q3
3 Here are 8 cards.
There is a number on each of six cards.
Two cards are blank.
Uzma wants the mean of the numbers on the 8 cards to be 4
She wants the range of the numbers on the 8 cards to be 9
Find the numbers that she should write on the two blank cards.
(3)
| Scheme | Marks |
|---|---|
| 8 × 4 (= 32) or 1 + 9 or 10 − 1 | M1 |
| "32" – (3 + 1 + 5 + 5 + 2 +3)(=13) or (3 + 1 + 5 + 5 + 2 +3) + "10"(=29) | M1 |
| 3 and 10 | A1 |
| (3) |
Notes
M1: A correct method to find the total of the 2 missing numbers
A1: If M0 scored then SCB1 for an answer of two numbers with a sum of 13 or two numbers that give a range of 9 for the 8 cards