Higher Plus

A bag holds 7 red, 6 blue and 6 green counters. Two are taken without replacement. Given neither is green, what is the probability both are red?

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

Rationalise the denominator of 25/5, giving your answer in its simplest form.Rationalise the denominator of 25/sqrt(5), giving your answer in its simplest form.

The curve y = sin x° is drawn for 0 ≤ x ≤ 360. Write down the value of y when x = 360.The curve y = sin x° is drawn for 0 <= x <= 360. Write down the value of y when x = 360.

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.