(a) On the probability scale below, mark with a cross (×) the probability that Kim picks a number 7(1)
(b) On the probability scale below, mark with a cross (×) the probability that Kim picks a number greater than 5(1)
(c) Find the probability that Kim picks an even number. (2)
Mark scheme (a)
Answer
Mark
Mark scheme
cross at 0
B1
cao
Mark scheme (b)
Answer
Mark
Mark scheme
cross at \(\dfrac{1}{2}\)
B1
cao
Mark scheme (c)
Answer
Mark
Mark scheme
\(\dfrac{5}{8}\)
M1
for \(\dfrac{\text{``}5\text{''}}{a}\) where \(a \gt \text{``}5\text{''}\) or \(\dfrac{b}{8}\) where \(b \lt 8\) or for identifying all the even numbers, 2, 6 and 8 or for writing the correct probability using the wrong notation eg \(5 : 8\)
A1
for \(\dfrac{5}{8}\) oe
Additional guidance
To ft “5” the “5” needs to be clearly stated as being the number of even numbers; otherwise accept 5 only; could be indicated alongside the given numbers.
Could be written as a decimal (0.62, 0.625 or 0.63) or equivalent percentages to these
