Foundation January 2020 Paper 2R Q8
8 Lin has 60 bricks.
He puts his 60 bricks into a bag.
Some information about the 60 bricks is shown in the two-way table.
| orange | blue | yellow | Total | |
|---|---|---|---|---|
| small | 7 | 14 | ||
| large | 13 | 33 | ||
| Total | 23 | 60 |
(a) Complete the two-way table. (3)
One of the bricks is taken at random from the bag.
(b) Write down the probability that this brick is blue. (1)
Lin now puts all his large bricks into a sack.
He takes at random a large brick from the sack.
(c) Write down the probability that this large brick is orange. (2)
| Scheme | Marks | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| B3 | ||||||||||||||||||||
| (3) |
Notes
B3: All 6 entries correct
B2 for 4 or 5 correct entries
B1 for 2 or 3 correct entries
| Scheme | Marks |
|---|---|
| \(\dfrac{23}{60}\) | B1 |
| (1) |
Notes
B1: Allow 0.38(333…) or 38(.33…)%
| Scheme | Marks |
|---|---|
| \(\dfrac{13}{33}\) | B2 |
| (2) | |
| (6 marks) |
Notes
B2: B1 for \(\dfrac{n}{33}\) where \(n \lt 33\) or \(\dfrac{13}{m}\) where \(m \gt 13\)