(a) On the probability scale below, mark with a cross (\(\times\)) the probability that he gets a head.(1)
Ann rolls a fair dice once.
(b) On the probability scale below, mark with a cross (\(\times\)) the probability that she gets a 7(1)
Fred throws a fair coin and rolls a fair dice.
(c)
(i) List all the possible combinations. The first one has been done for you. (H, 1)
(ii) Write down the probability that Fred gets a head and an even number. (4)
Mark scheme (a)
Answer
Mark
Notes
Cross at \(\frac{1}{2}\)
1
B1 for cross (\(\times\)) within overlay
Mark scheme (b)
Answer
Mark
Notes
Cross at 0
1
B1 for cross (\(\times\)) within overlay
Mark scheme (c)
Working
Answer
Mark
Notes
(i) H1 H2 H3 H4 H5 H6 T1 T2 T3 T4 T5 T6
(ii)
\(\frac{3}{12}\)
4
(i) M1 for evidence of attempting combinations eg at least 5 correct A1 for all 12, no extras or repeats (Can repeat H1)
(ii) M1 ft for evidence of correct numerator or denominator in a fraction less than 1 A1 ft from (i) Note probability must written as a percentage, decimal or fraction
