Higher
10th September 1979
- 1Circle Theorems2 marks
ABCD is a cyclic quadrilateral. Angle ABC is 112°. Work out angle ADC.
- 2Probability Trees3 marks
A bag holds 3 red and 5 blue counters. Two are taken without replacement. Work out the probability both are red.
- 3Cumulative Frequency2 marks
A cumulative frequency graph is drawn for 116 values. What cumulative frequency do you read across from to estimate the lower quartile?
- 4The Product Rule for Counting3 marks
A code is 2 letters (A to Z) followed by 4 digits (0 to 9), and repeats are allowed. How many codes are possible?
- 5Changing the Subject of a Formula3 marks
Make x the subject of y = 7x^2 - 4.
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