allery50 વિદ્યાર્થીઓના એક વર્ગમાં, 30 ગણિતનો અભ્યાસ કરે છે, 25 વિજ્ઞાનનો અભ્યાસ કરે છે અને 15 બંનેનો અભ્યાસ કરે છે. બેમાંથી એકપણ વિષયનો અભ્યાસ ન કરતા હોય તેવા કેટલા છે?
A5
B12
C10
D8
Answer & Solution
Correct answer: C. 10
યોગ = 30 + 25 - 15 = 40 વિદ્યાર્થીઓ, તેથી 50 - 40 = 10 બેમાંથી એકપણનો અભ્યાસ કરતા નથી.
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