allery50 विद्यार्थ्यांच्या एका समूहात, 30 जणांना निळा रंग आवडतो, 25 जणांना हिरवा रंग आवडतो आणि 10 जणांना यांपैकी कोणताही रंग आवडत नाही. दोन्ही रंग आवडणारे किती विद्यार्थी आहेत?
A10
B15
C20
D25
Answer & Solution
Correct answer: B. 15
Union = 50 - 10 = 40. दोन्ही रंग आवडणारे = 30 + 25 - 40 = 15.
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