Let the number x.
Then the number divided by 2 gives
Subtract 3.8 from the quotient gives
Hence,
x = 21.6
Answer:
The number of children are 4 out of which 3 are girls
Step-by-step explanation:
Data provided in the question:
P(Two randomly selected children are girls) =
now,
let the number of children be 'n'
the number of girls be 'x'
thus,
P(Two randomly selected children are girls) = =
also,
=
thus,
=
or
=
or
2x(x-1) = n(n-1)
now
for x = 3 and n = 4
i.e
2(3)(3-1) = 4(4-1)
12 = 12
hence, the relation is justified
therefore,
The number of children are 4 out of which 3 are girls
X+(4x-20)=180
=>5x-20=180
=>5x=200
=>x=40
You are basically trying to find the area of two triangles and a rectangle.
Rectangle= A= length*width
Triangle= A= 1/2*base*height
Rectangle:
1.5*1.9= 2.85
Two triangles:
A= 1/2* 0.5*1.5
A=1/2*.75
A=0.375
Multiply that by two, because the triangles are the same.
.75
.75+2.85= 3.6
3.60 ft^2 <== the answer :)
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