1MA0 Foundation November 2012 Paper 2 Q22
22 Hannah has a biased coin.
She is going to throw the coin once.
The probability of getting heads is 0.7
(a) Work out the probability of getting tails. (2)
Jamal is going to throw this coin 200 times.
(b) Work out an estimate for the number of heads Jamal will get. (2)
| Working | Answer | Mark | Notes |
|---|---|---|---|
| \(1 - 0.7\) | 0.3 | 2 | M1 for \(1 - 0.7\) A1 for 0.3 oe |
| Working | Answer | Mark | Notes |
|---|---|---|---|
| \(200 \times 0.7\) | 140 | 2 | M1 for \(200 \times 0.7\) A1 for 140 |