Foundation June 2019 Paper 1 Q17
17 Stuart throws a biased coin 10 times.
He gets 7 Tails.
Maxine throws the same coin 50 times.
She gets 30 Tails.
Prasha is going to throw the coin once.
(i) Whose results will give the better estimate for the probability that she will get Tails, Stuart’s or Maxine’s?
You must give a reason for your answer. (1)
You must give a reason for your answer. (1)
(ii) Use Stuart’s and Maxine’s results to work out an estimate for the probability that Prasha will get Tails. (1)
| Answer | Mark | Mark scheme |
|---|---|---|
| Maxine with bigger number of trials | C1 | for Maxine with reason Acceptable examples She throws the coin more times than Stuart Not acceptable examples Maxine throws it 50 times She gets more Tails Stuart (he) ...... |
| Answer | Mark | Mark scheme |
|---|---|---|
| \(\dfrac{37}{60}\) | B1 | for \(\dfrac{37}{60}\) oe |