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Question

Social engineering is ----

Tricking people into reveoling their password

Utilizing the social media platform

Updating a current system to meet the needs of users

Salvaging outdated softwares

ANSWER : 1

Descrption

<pre>১ম ক্ষেত্রে, r  =  <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mrow><mi>I</mi><mo>&#xD7;</mo><mn>100</mn></mrow><mrow><mi>P</mi><mi>n</mi></mrow></mfrac></math> %
 =  <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mrow><mn>2000</mn><mo>&#xD7;</mo><mn>100</mn></mrow><mrow><mn>6000</mn><mo>&#xD7;</mo><mn>4</mn></mrow></mfrac></math> %
 =  <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mn>25</mn><mn>3</mn></mfrac></math> %
এখানে, P  =  6000 Tk.
I  =  (8000  -  6000) Tl/
 =  2000 Tk
n  =  4 বছর
২য় ক্ষেত্রে,
n =  <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mrow><mi>I</mi><mo>&#xD7;</mo><mn>100</mn></mrow><mrow><mi>p</mi><mi>r</mi></mrow></mfrac></math>
 =  <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mrow><mn>175</mn><mo>&#xD7;</mo><mn>100</mn></mrow><mrow><mn>525</mn><mo>&#xD7;</mo><mstyle displaystyle = "true"><mfrac><mn>25</mn><mn>3</mn></mfrac></mstyle></mrow></mfrac></math>
<math xmlns = "http://www.w3.org/1998/Math/MathML"><mo>&#x2234;</mo></math> n  =  4 বছর।
এখানে,
P  =  525
I  =  700  -  525  =  175
r  =  <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mn>25</mn><mn>3</mn></mfrac></math>

</pre>

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