4MA0 Foundation June 2012 Paper 1 Q5

EdexcelFoundationOld spec10 marksPercentages Units & Time

5 Here is some information from a weather forecast website for Chicago for one day in January.

Probability of snow	85%
Maximum temperature	−2°C
Minimum temperature	−9°C
Sunrise	7 05 am
Sunset	5 02 pm

(a) Write 85% as a decimal. (1)

(b) Write 85% as a fraction.
Give your fraction in its simplest form. (2)

(d) Write 5 02 pm as a time using the 24-hour clock. (1)

(e) Work out the length of time between 7 05 am and 5 02 pm.
Give your answer in hours and minutes. (3)

(f) The probability that it will snow is 85%.
Work out the probability that it will not snow. (1)

Scheme	Marks
0.85	B1
	(1)

Scheme	Marks
\(\dfrac{85}{100}\)	M1
\(\dfrac{17}{20}\)	A1
	(2)

Scheme	Marks
−2 − (−9) or −7	M1
7	A1
	(2)

Scheme	Marks
17 02	B1
	(1)

Mark scheme (e)

Scheme	Marks
eg 55 min + 9 h + 2 min 9 h + 55 min + 2 min 10 h − 3 min	M2
9 (hours) 57 (minutes)	A1
	(3)

Notes

M2: M1 for each of the following up to a maximum of 2 marks
1. 17 02 − 7 05 but not 7 05 − 5 02
2. An attempt to make some use of a counting on method (for example, a list of 3 or more relevant times may be taken as sufficient evidence of this)
3. 9 on the hours answer line
4. 57 on the minutes answer line
SC If no method marks scored, award B1 for 10 h 3 mins

A1: cao

Scheme	Marks
15%	B1
	(1)
	(Total 10 marks)