Daily Practice - Higher

18 students study Spanish and 7 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.

A box plot has minimum 10, lower quartile 15, median 20, upper quartile 25 and maximum 33. Work out the interquartile range.

A mass is 270 kg, correct to the nearest 10. Write down the lower bound.

For the curve y = x² + 7x - 9, work out y when x = 4.For the curve y = x^2 + 7x - 9, work out y when x = 4.

y is directly proportional to x². When x = 3, y = 18. Work out y when x = 8.y is directly proportional to x^2. When x = 3, y = 18. Work out y when x = 8.