Page 1 :
CHAPTER 3, , DATA HANDLING, , , , Points to Remember :, , , , Mode : The observation which occurs most frequentlpin.a set of data is called Mode,, , Median : Median refrs to the value which lies in thoade of the data (when arranged, {in inereasing oF decreasing ordes),, , , , Prob The measure of the chance of omething happening is called probability, , , , © The probability of happening am.eveat may lc between O and 1, © When an cntcome is eoxtain’to Iappen, is probubity is, , {© When an outcome is impossible, its probability is 0., , ‘QUESTIONS, , 1. Find mean of the Rist beven shale numbers,, 2. ind mean of the frkt six natural numbers,, , 8. Cale, , , , (he mon of 2,4, 6 8,10, 12, 14, 16, , 4. Calculate the’ mean of frst five multiples of 10, , , , 5. Theyfverage marks score 72, Pind bis total marks,, , 6 The marks scored by a student in five subjects are 80, 75, 66, 34 and 91, How much, should he scone in the Gth subject to make hi, , by a student in five subjects ix, , , , , , , , 7. Find mean of the fest five even numbers,, Find mean of the frst six odd numbers, , 9. Caleulate the mean : 7.6, 48, 85, 64, 56,15, 72 44, , , , 10, The age in years of 8 teachers of a school are, 28,54, 35, 26,33, 40,39, find dhe men,, , 11. What is the range of the following data : 46, 63, 25, 23, 39, 42, 21, 47, 68?