Last month, Harri drove 850 miles in his car. his cars fuel consumption is 45.6 miles per gallon.
petrol cost £1.09 per litre.
given that 8 pints = 1 gallon, work out how much Harri spent on fuel last month, you must give working outs.

The random variable x has probability density function f (x) = k(−x²+5x−4) 1 ≤ x ≤ 4 or =0 1 show that k = 2/9 find 2 e(x), 3 the mode of x, 4 the cumulative distribution function f(x) for all x. 5 evaluate p(x ≤ 2.5). 6 deduce the value of the median and comment on the shape of the distribution.