In a factory, 50 out of 1,000 pens are found to be defective.

Mathematics

2 answers:

Ivanshal [37]2 years ago

6 0

0.05

u can divide 50 by 1000

baherus [9]2 years ago

3 0

To find the percentage you have to divide the part over the whole then multiply by 1000, in this example we want to find out the percentage corresponding to the defective pens.
No. Defective pens= 50
No. Pens = 1000
^ this means all pens defective and none defective since we went to see what proportion they make out of the WHOLE

part / whole *100= defective pens%

50/1000 * 100 = defective pens%
Defective pens = 5%

So, 5% of all pens in that factory are defective.

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In the circle above, the length of AO is 1, and x = 88º. What is the area of sector AOB?

max2010maxim [7]

The complete question in the attached figure

we know that
[area of a circle]=pi*r²
for r=1 unit
[area of a circle]=pi*1²---------> pi units²

if the area a full circle of 360°--------------> is pi
the area of sector 88°------------------------> X
X=88*pi/360--------> 0.77 units²

the answer is
 the area of sector AOB is 0.77 units²