Answer:
Step-by-step explanation:
Mass (m kg) frequency mass (m kg) c.f.
0 < m ≤ 0.1 4 m ≤ 0.1 4
0.1 < m ≤ 0.2 6 m ≤ 0.2 10
0.2 < m ≤ 0.5 58 m ≤ 0.5 68
0.5 < m ≤ 0.8 28 m ≤ 0.8 96
0.8 < m ≤ 1.0 4 m ≤ 1.0 100
Total number of parcels surveyed = cumulative frequency = 100
