4MA0 Foundation June 2017 Paper 1R Q9
9 Hibaru collects shells from the beach.
Here are the lengths, in mm, of 10 shells he found on Monday.
20 24 24 24 28 32 36 38 40 45
(a) Write down the mode. (1)
Hibaru selects at random one of the 10 shells.
(b)
(i) Find the probability that this shell is the shell with the greatest length.
(ii) Find the probability that the length of this shell is greater than the mode.
(3)| Scheme | Marks |
|---|---|
| 24 | B1 |
| (1) |
| Scheme | Marks |
|---|---|
| (i) \(\dfrac{1}{10}\) | B1 |
| (ii) 28, 32, 36, 38, 40, 45, or \(\dfrac{6}{n}\) | M1 |
| \(\dfrac{6}{10}\) | A1 |
| (3) | |
| (4 marks) |
Notes
M1: ft from (a)
A1: ft from (a)