Daily Practice - Higher

22 students study Spanish and 4 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.

A box plot has minimum 1, lower quartile 7, median 9, upper quartile 11 and maximum 21. Work out the interquartile range.

A mass is 18 kg, correct to the nearest whole number. Write down the lower bound.

For the curve y = x² + 5x - 11, work out y when x = -3.For the curve y = x^2 + 5x - 11, work out y when x = -3.

y is directly proportional to x². When x = 4, y = 96. Work out y when x = 7.y is directly proportional to x^2. When x = 4, y = 96. Work out y when x = 7.