KCSE MATHEMATICS QUESTIONS AND ANSWERS ON SEQUENCE AND SERIES FORM 3 LEVEL : The terms of an Arithmetic sequence are 2,5,8,11, ... (a) Find: (i) the common difference of the sequence; (1 mark) (ii) the next two terms of the sequence; (2 marks) (iii) the 30th term of the sequence. (2 marks) (b) The sum of the first n terms of the s
KCSE MATHEMATICS QUESTIONS AND ANSWERS ON STATISTICS II FORM 4 LEVEL : The table below represents the number of streams in 20 schools. Calculate: (a) the mean number of streams per school; (3 marks) (b) the variance; (5 marks) (c) the standard deviation correct to 2 decimal places. (2 marks)