The mean, median, and mode of the 7 data values 60,100,x,40,50,200,90 are all equal to x. What is the value of ?

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Thân Văn Thức

17 tháng 3 2016 - olm

The mean, median, and mode of the 7 data values 60,100,x,40,50,200,90 are all equal to x. What is the value of ?

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Perimeters of a triangle is: 6.2+8.3+9.5=24cm

But a square and a triangle have equal perimeters

⇒Perimeters of a square is 24cm

So: the side of a square=\(\dfrac{24}{4}\)=6

Other way: the area of a square=a.a

⇔S_square=6*6=36 (cm²)