Prove the following

Question:

If $400 \Omega$ of resistance is made by adding four $100 \Omega$ resistance of tolerance $5 \%$, then the tolerance of the combination is :

  1. $20 \%$

  2. $5 \%$

  3. $10 \%$

  4. $15 \%$


Correct Option: , 2

Solution:

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