Daily Practice - Higher
22nd October 1994
- 1Conditional Probability3 marks
15 students study Spanish and 9 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
- 2Box Plots2 marks
A box plot has minimum 2, lower quartile 9, median 15, upper quartile 24 and maximum 33. Work out the interquartile range.
- 3Recurring Decimals to Fractions3 marks
Write the recurring decimal 0.2727... as a fraction in its simplest form.
- 4Quadratic Formula3 marks
Work out the discriminant of 4x^2 + 2x + 3 = 0 and say how many real solutions it has.
- 5Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 5, y = 100. Work out y when x = 9.
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