Paper 6 October/November 2004 MATHEMATICH (9709/6) A Levels
لطفا برای اطمینان از عملکرد و تجربه بهتر از مرورگرهای مدرن و به روز مانند کروم یا فایرفاکس استفاده کنید.

a) State three conditions that must be satisfied for a situation to be modelled by a binomial distribution.
On any day, there is a probability of 0.3 that Julie’s train is late.
b) Nine days are chosen at random. Find the probability that Julie’s train is late on more than 7 days or fewer than 2 days.
c) 90 days are chosen at random. Find the probability that Julie’s train is late on more than 35 days or fewer than 27 days.