In the figure, one side of the rectangle divides the circle in half.
1 answer:
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Step-by-step explanation:
Sets are represented in a Venn diagram by circles drawn inside a rectangle representing the universal set.
The region outside the circle represents the complement of the set.
The overlapping region of two circles represents the intersection of the two sets.
Two circles together represent the union of the two sets.
Given- 90% of runner completed the marathon.
out of which 30% are man.
To proof - let the total number of runner be y.
the men completed the marathon be 30% of the 90%.
thus we have
30% of 90% of y = 270
×
×y = 270
now solving the above equation
we get
Thus solving the equation
y = 1000
Thus the total runners of men who completed marathon be 1000.
Hence proved