Write the correct alternative answer for each of the following questions. (i) Which of the following data is not primary ?(A) By visiting a certain class, gathering information about attendence of students.(B) By actual visit to homes, to find number of family members.(C) To get information regarding plantation of soyabean done by each farmer from the village Talathi.(D) Review the cleanliness status of canals by actually visitiing them.(ii) What is the upper class limit for the class 25-35 ? (A) 25 (B) 35 (C) 60 (D) 30 (iii) What is the class-mark of class 25-35 ? (A) 25 (B) 35 (C) 60 (D) 30(iv) If the classes are 0-10, 10-20, 20-30... then in which class should the observation 10 be included ?(A) 0-10 (B) 10-20 (C) 0-10 and 10-20 in these 2 classes (D) 20-30(v) If x¯ is the mean of x1, x2 ............. xnand y¯ is the mean of y1, y2 ................yn and z¯ is the mean x1, x2 ..............xn, y1, y2,.....................yn then z = ?(A) x¯ + y¯2 ( B) x¯ + y¯ (C) x¯ + y¯n (D) x¯ + y¯2n (vi) The mean of five numbers is 80, out of which mean of 4 numbers is 46, find the 5th number :(A) 4 (B) 20 (C) 434 (D) 66(vii) Mean of 100 observations is 40. The 9th observation is 30. If this is replaced by 70 keeping all other observations same, find the new mean.(A) 40.6 (B) 40.4(C) 40.3(D) 40.7(viii) What is the the mode of 19, 19, 15, 20, 25, 15, 20, 15?(A) 15, (B) 20(C) 19(D) 25 (ix) What is the median of 7, 10, 7, 5, 9, 10 ?(A) 7 (B) 9 (C) 8(D) 10(x) From following table, what is the cumulative frequency of less than type for the class 30-40 ? Class 0-10 10-20 20-30 30-40 40-50 Frequency 7 3 12 13 2 (A) 13(B) 15(C) 35 (D) 22