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Biology Exam Question

The figure below shows a plan of a garden.
A student estimates the number of daisy plants growing on the lawn. The student places a quadrat at 10 different positions on the lawn. The quadrat measures 50 cm × 50 cm.
The student counts the number of daisy plants in each quadrat.

(c) The mean number of daisy plants in each quadrat is 6.

Calculate the number of daisy plants on the lawn.
Give your answer to 3 significant figures.
Number of daisy plants on the lawn =

Can someone tell me how to calculate this for biology. The mark scheme jumps to a mean of 24 (6x4) where did the 4 come from. I can calculate the area, but it he mean.
Could you send a screenshot/full page of the question? I think it's missing some details is a lawn size listed somewhere? Does the plan of the garden have measurements you could use?

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