If a+b=10 and a-b=20, then what will be the value of a/ b <br>

1. If a+b=10 and a-b=20, then what will be the value of a/ b

[IBBL Assistant Officer- 2013 : 2013]

1. 10/20

2. 1/3

3. -1/3

4. -3

Answer

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