Daily Practice - Higher

25 students study Spanish and 5 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.

A box plot has minimum 5, lower quartile 10, median 17, upper quartile 24 and maximum 27. Work out the interquartile range.

Write √75 in the form a √b, where b is as small as possible.Write sqrt(75) in the form a sqrt(b), where b is as small as possible.

For the curve y = x² - 7x - 1, work out y when x = 4.For the curve y = x^2 - 7x - 1, work out y when x = 4.

y is directly proportional to x². When x = 5, y = 125. Work out y when x = 7.y is directly proportional to x^2. When x = 5, y = 125. Work out y when x = 7.