Higher Plus

A bag holds 5 red, 4 blue and 6 green counters. Two are taken without replacement. Given neither is green, what is the probability both are red?

On a histogram the bar for 20 < x ≤ 30 has a frequency density of 0.4. How many values are in that class?On a histogram the bar for 20 < x <= 30 has a frequency density of 0.4. How many values are in that class?

A block has mass 790 g (to the nearest 10 g) and volume 6 cm³ (to the nearest cm³). Work out the upper bound of its density, to 2 decimal places.A block has mass 790 g (to the nearest 10 g) and volume 6 cm^3 (to the nearest cm^3). Work out the upper bound of its density, to 2 decimal places.

Use the iteration x(n+1) = cube root of (5x(n) + 8) with x(0) = 5. Work out x(1) to 3 decimal places.

y is directly proportional to x³. When x = 4, y = 256. Work out y when x = 3.y is directly proportional to x^3. When x = 4, y = 256. Work out y when x = 3.