Higher
2nd November 1964
- 1Repeated Percentage Change3 marks
A price rises by 20% and then falls by 20%. Work out the overall percentage change, to 2 decimal places.
- 2Vectors3 marks
a is the column vector (-5, 0) and b is (-1, 3). Work out 4a - 3b as a column vector.
- 3Probability Trees3 marks
1 of 10 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 4Cumulative Frequency2 marks
A cumulative frequency graph is drawn for 180 values. What cumulative frequency do you read across from to estimate the lower quartile?
- 5Fractional and Negative Indices2 marks
Write 8^-3 as a fraction.
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