Foundation June 2018 Paper 2 Q13
13 A scout group has a raffle to raise money for charity.
There is 1 prize to be won in the raffle.
Laura buys 12 raffle tickets.
A total of 350 raffle tickets are sold.
Find the probability that Laura does not win the prize. (2)
| Answer | Mark | Mark scheme |
|---|---|---|
| \(\dfrac{338}{350}\) | M1 | for \(350 - 12\) (=338) or \(\dfrac{y}{350}\) oe where \(y \lt 350\) and \(y \neq 12\) or \(1 - \dfrac{12}{350}\) oe |
| A1 | oe |
Additional guidance
For the method mark probability fractions can be expressed as equivalent expressions, even if not correct probability notation
eg. 338 : 350 scores M1 A0
Using correct probability notation
Allow 0.96 to 0.97 or 96% to 97%