4MA0 Foundation June 2017 Paper 1 Q10

EdexcelFoundationOld spec4 marksBasic Probability

10 Here is a probability scale.

Probability scale from 0 to 1 with one half marked

(a) A fair ordinary dice is thrown once.

(i) On the probability scale, mark with a cross (×) the probability that the dice will land on a number less than 7
Label this cross A.

(ii) On the probability scale, mark with a cross (×) the probability that the dice will land on an odd number.
Label this cross B.

(2)

Here is a biased 3-sided spinner.

Three-sided spinner with sections red, blue and green

When the spinner is spun, it can land on red or on blue or on green.
The table shows the probability that the spinner lands on red and the probability that the spinner lands on blue.

Colour	red	blue	green
Probability	0.3	0.25

Ruochen spins the spinner once.

(b) Work out the probability that the spinner lands on green. (2)

Scheme	Marks
(i) Cross marked and labelled at 1	B1
(ii) Cross marked and labelled at \(\dfrac{1}{2}\)	B1
	(2)

Scheme	Marks
1 − (0.3 + 0.25)	M1
0.45 oe	A1
	(2)
	(4 marks)

Notes