Daily Practice - Higher Plus

A bag holds 6 red and 3 blue counters. Two are taken without replacement. Given the first was red, what is the probability the second is blue?

A histogram has four 10-wide classes from 0, with frequency densities 1, 3, 2, 0.5. Which class contains the median?

Expand and simplify (6 + 2)(6 - 2).Expand and simplify (6 + sqrt(2))(6 - sqrt(2)).

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

y is inversely proportional to x². When x = 5, y = 32. Work out y when x = 4.y is inversely proportional to x^2. When x = 5, y = 32. Work out y when x = 4.