allery100 વિદ્યાર્થીઓમાંથી, 60 ને ગણિત ગમે છે, 50 ને વિજ્ઞાન ગમે છે અને 40 ને બંને ગમે છે. માત્ર ગણિત કેટલા વિદ્યાર્થીઓને ગમે છે?
A30
B20
C40
D60
Answer & Solution
Correct answer: B. 20
માત્ર ગણિત = કુલ ગણિત - બંને = 60 - 40 = 20.
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