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3. Find the class boundaries for the following frequency distribution:

Weights

frequency

140 – 149

1

150 – 159

3

160 – 169

11

170 – 179

26

180 – 189

14

190 - 199

6

139.5 - 149.5

149.5 - 159.5

159.5 - 169.5

169.5 - 179.5

179.5 - 189.5

189.5 - 199.5