allery50 വിദ്യാർത്ഥികളിൽ 30 പേർക്ക് നീലയും 25 പേർക്ക് പച്ചയും ഇഷ്ടമാണ്. 10 പേർക്ക് ഈ രണ്ടു നിറങ്ങളും ഇഷ്ടമല്ല. രണ്ടു നിറങ്ങളും ഇഷ്ടപ്പെടുന്നവർ എത്ര?
A10
B15
C20
D25
Answer & Solution
Correct answer: B. 15
യൂണിയൻ = 50 - 10 = 40. രണ്ടും പോലെ = 30 + 25 - 40 = 15.
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