A group of 123 workers went to a canteen for cold drinks, ice-cream and tea, 42 workers took ice-cream, 36 tea and 30 cold drinks. 15 workers purchased ice-cream and tea, 10 ice-cream and cold drinks, and 4 cold drinks and tea but not ice-cream, 11 took ice-cream and tea but not cold drinks. Determine how many workers did not purchase anything?
Text Solution
Verified by Experts44
(44)
………… (i)
………… (ii)
…………… (iii)
………… (iv)
………… (v)
…………… (vi)
………… (vii)
From (iv) and (vii), 
……… (viii)
From (v) and (viii), 
………… (ix)
From (i), 
……… (x)
From (ii), 
……… (xi)
From (iii), 
……… (xii)
Number of required persons
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