calculate the arthmetic means of the following distribution class = less than 10 10-20 20-30 30-40 40-50 50-60 more than 60
frequency = 5 12 18 22 6 157 165
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Dispersal of seeds is very important for the survival of plant species. If plants grow too closely together, they have to compete for light, water and nutrients from the soil. Seed dispersal allows plants to spread out from a wide area and avoid competing with one another for the same resources.
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