# Edexcel Gce Maths Formula

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n29278a gce maths 6684 jan 2008.indd edexcel

(2) The number of cars passing an observation point in a 10 minute interval is modelled by a Poisson distribution with mean(b) Find the probability that in a randomly chosen 60 minute period there will be (i) exactly 4 cars passing the observation point, (ii) at least 5 cars passing the observation point. (5) The number of other vehicles, other than cars, passing the observation point in a 60 minute interval is modelled by a Poisson distribution with mean 12. (c) Find the probability that exactly 1 vehicle.n36649a gce maths 7361 january 2011.indd edexcel

Find (a) the two possible values of the common ratio of G, (3) (b) the first term of(1) The sum of the first three terms of G is greater than the sum of the first four terms of(c) Find the sum of the first 12 terms ofWrite down all the figures on your calculator display. (4) (d) Find the sum to infinity of(3) (e) Find, to 3 significant figures, the percentage error when the sum of the first 12 terms of G is used as an approximation for the sum to infinity of(3)n35378a gce maths 7361 june 2010.indd edexcel

The passport of each person in queue A is processed manually and x passports are processed each hour. (a) Write down an expression, in terms of x, for the mean time, in minutes, to process one passport in queue(1) The passport of each person in queue B is processed electronically and (x + 120) passports are processed each hour. (b) Write down an expression, in terms of x, for the mean time, in minutes, to process one passport in queue(1) The difference in the mean time to process a passport in queue A and .
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