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In a club three-tenth of its members play cards only and four-tenth play carom-board only. If 30 members play none of these games and 120 play both; find

using a Venn-diagram, the total number of members in the club.



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Let the total number be x
x- (3x/10 + 4x/10) = 30 +120
⇒3x/10 =150
⇒x =500
please refer to the venn diagram attached
1 5 1
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