Paper 6 May/June 2009 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.

The following histogram illustrates the distribution of times, in minutes, that some students spent taking a shower.
a) Copy and complete the following frequency table for the data.
b) Calculate an estimate of the mean time to take a shower.
c) Two of these students are chosen at random. Find the probability that exactly one takes between 7 and 10 minutes to take a shower.