Daily Practice - Higher Plus

A bag holds 8 red and n blue counters. The probability of taking a red is 8/13. Work out n.

A histogram has four 20-wide classes from 0, with frequency densities 1, 0.5, 3, 2. Which class contains the median?

A block has mass 520 g (to the nearest 10 g) and volume 13 cm³ (to the nearest cm³). Work out the upper bound of its density, to 2 decimal places.A block has mass 520 g (to the nearest 10 g) and volume 13 cm^3 (to the nearest cm^3). Work out the upper bound of its density, to 2 decimal places.

In an algebraic proof, how would you write the next odd number after 2n + 1 in terms of an integer n?

y is inversely proportional to x². When x = 3, y = 48. Work out y when x = 4.y is inversely proportional to x^2. When x = 3, y = 48. Work out y when x = 4.