Find the correct answer from the alternatives given.(1) The persons of O– blood group are 40%. The classification of persons based on blood groups is to be shown by a pie diagram. What should be the measures of angle for the persons of O– blood group ? (A) 114°) (B) 140° (C) 104° (D) 144° (2) Different expenditures incurred on the construction of a building were shown by a pie diagram. The expenditure Rs 45,000 on cement was shown by a sector of central angle of 75°. What was the total expenditure of the construction ? (A) 2,16,000 (B) 3,60,000 (C) 4,50,000 (D) 7,50,000 (3) Cumulative frequencies in a grouped frequency table are useful to find . . . (A) Mean (B) Median (C) Mode (D) All of these (4) The formula to find mean from a grouped frequency table is X=A+∑fiui∑fi×hg In the formula u i = . .. (A) xi+Ag (B) xi-A (C) xi-Ag (D) A-xig (5) Distance Covered per litre (km) 12 - 14 14 - 16 16 - 18 18 - 20 No. of cars 11 12 20 7 The median of the distances covered per litre shown in the above data is in the group . . . . . . (A) 12 - 14 (B) 14 - 16 (C) 16 - 18 (D) 18 - 20 (6) No. of trees planted by each student 1 - 3 4 - 6 7 - 9 10 - 12 No. of students 7 8 6 4 The above data is to be shown by a frequency polygon. The coordinates of the points to show number of students in the class 4-6 are . . . . (A) (4, 8) (B) (3, 5) (C) (5, 8) (D) (8, 4)