Daily Practice

Higher

24th October 1981

5 questions · 14 marks · Grades 6-7 · 61 question types in this band

1
Probability Trees3 marks
3 of 10 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
2
Box Plots2 marks
A box plot has minimum 9, lower quartile 14, median 22, upper quartile 31 and maximum 41. Work out the interquartile range.
3
Reverse Percentages3 marks
A bill is £360 including VAT at 20%. Work out the amount before VAT.
4
Simultaneous Equations3 marks
5 teas and 1 cake cost £12.70. 1 tea and 4 cakes cost £11.85. Find the price of a tea.
5
Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 2, y = 32. Work out y when x = 9.

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