125, 127, 130, 135, 142, 153, 165 (a) 130         (b) 142      (c) 153         (d) 165

165, 195, 255, 285, 345, (.......) (a) 375 (b) 420 (c) 435 (d) 390

The heights (in cm) of 22 students were recorded as under: 125, 132, 138, 144, 142, 136, 134, 125, 135, 130, 126, 132, 135, 142, 143, 128, 126, 136, 135, 130, 130, 133. Prepare a frequency distribution table, taking equal class intervals and starting from 125-130, where 130 is not included.

Given below are heights of 15 boys of a class measured in cm: 128, 144, 146, 143, 136, 142, 138, 129, 140, 152, 144, 140, 150, 142, 154. Find (a) The height of the tallest boy. (b) The height of the shortest boy. (c) The range of the given data. (d) The median height of the boys.

5/ 4 as a percent is (a) 80% (b) 125% (c) 120% (d) 130%

The sum of 2.75 and 3.78 is 1.03 (b) 1.53 (c) 4.53 (d) 5.53

In Figure, O is the centre of the circle such that /_A O C\ =130^0,\ then /_A B C= (a) 130^0 (b) 115^0 (c) 65^0 (d) 165^0

The heights of 50 students, measured to the nearest centimetres, have been found to be as follows: 161 150 154 165 168 161 154 162 150 151 162 164 171 165 158 154 156 172 160 170 153 159 161 170 162 165 166 168 165 164 154 152 153 156 158 162 160 161 173 166 161 159 162 167 168 159 158 153 154 159 Represent the data given above by a grouped frequency distribution table, taking the class intervals as 160-165, 165-170, etc.

The heights of 50 students, measured to the nearest centimetres, have been found to be as follows: 161 150 154 165 168 161 154 162 150 151162 164 171 165 158 154 156 172 160 170153 159 161 170 162 165 166 168 165 164154 152 153 156 158 162 160 161 173 166161 159 162 167 168 159 158 153 154 159 (i) Represent the data given above by a grouped frequency distribution table, taking the class intervals as 160 - 165, 165 - 170, etc.(ii) What can you conclude about their heights from the table?