Question
The nature of an agreement made under the provisions of
Section 20 of the  Indian Contract Act would be:ÂSolution
S. 20. Agreement void where both parties are under mistake as to matter of fact.— Where both the parties to an agreement are under a mistake as to a matter of fact essential to the agreement the agreement is void. Explanation.—An erroneous opinion as to the value of the thing which forms the subject-matter of the agreement, is not to be deemed a mistake as to a matter of fact. 
 ·        Void- null not having any force or validity. ·        Voidable- can become valid at the option of parties. ·        Valid- having force of law.
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