1MA0 Foundation March 2013 Paper 1 Q23
23 5 schools sent some students to a conference.
One of the schools sent both boys and girls.
This school sent 16 boys.
The ratio of the number of boys it sent to the number of girls it sent was 1 : 2
The other 4 schools sent only girls.
Each of the 5 schools sent the same number of students.
Work out the total number of students sent to the conference by these 5 schools. (4)
| Answer | Mark | Notes |
|---|---|---|
| 240 | 4 | M1 for \(16 \times 2\) (= 32 girls) M1 for \(16 + '16 \times 2'\) (= 48) M1 (dep on the previous M1) for \((16 + '32') \times 5\) or \((16 + '32') \times (4 + 1)\) A1 cao OR M1 for 1 : 2 = 3 parts M1 for 5 schools \(\times\) 3 parts (= 15 parts) M1 (dep on the previous M1) for ‘15’ parts \(\times\) 16 A1 cao SC B2 for 176 given on the answer line |