4MA0 Foundation January 2012 Paper 2 Q16
16 Here are 8 dominoes.
The 8 dominoes are put in a bag.
Helima takes at random a domino from the bag.
(a) Find the probability that she takes a domino with a total of
(i) more than 5 spots,
(ii) 6 spots,
(iii) 7 spots.
(4)Riaz takes at random a domino from the bag of 8 dominoes.
(b) Find the probability that he takes a domino with a total of 8 spots or a domino with a total of 9 spots. (2)
| Scheme | Marks |
|---|---|
| (i) Answer: 1 | B1 |
(ii) Answer: \(\dfrac{1}{8}\) | B1 |
(iii) Answer: \(\dfrac{2}{8}\) or \(\dfrac{1}{4}\) | M1 A1 |
| (4) |
Notes
B1: Also accept \(\dfrac{1}{1}\), \(\dfrac{8}{8}\), 100%
M1
A1: for denominator of 8
A1: for denominator of 8
for numerator of 2
SC B2 for \(\dfrac{1}{4}\)
| Scheme | Marks |
|---|---|
| \(\dfrac{3}{8} + \dfrac{2}{8}\) oe | M1 |
| \(\dfrac{5}{8}\) | A1 |
| (2) | |
| (Total 6 marks) |