Daily Practice · Higher

Daily Practice - Higher

Grades 6-7 - Higher-tier method and manipulation.

19th April 2010

5 questions · 13 marks · Grades 6-7 · 61 question types in this band

1
Probability Trees3 marks
8 of 10 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
2
Cumulative Frequency2 marks
A cumulative frequency graph is drawn for 160 values. What cumulative frequency do you read across from to estimate the lower quartile?
3
Bounds2 marks
A mass is 25.2 kg, correct to 1 decimal place. Write down the lower bound.
4
Equation of a Line3 marks
A line has gradient 2 and passes through (3, 3). Work out its equation.
5
Repeated Percentage Change3 marks
A price rises by 25% and then falls by 15%. Work out the overall percentage change, to 2 decimal places.

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