Subject
Quantitative Aptitude
Topic
Set
In a class of 78 students 41 are taking French, 22 are taking German. Of the students taking French or German, 9 are taking both courses. How many students are not enrolled in either course?
In a class of 78 students 41 are taking French, 22 are taking German. Of the students taking French or German, 9 are taking both courses. How many students are not enrolled in either course?
ক)
6খ)
12গ)
24ঘ)
18Explanation
দেওয়া আছে, মোট ছাত্র = ৭৮ জন ফরাসি নিচ্ছে = ৪১ জন জার্মান নিচ্ছে = ২২ জন উভয় কোর্স নিচ্ছে = ৯ জন প্রথমে আমাদের বের করতে হবে কতজন ছাত্র অন্তত একটি কোর্স (ফরাসি অথবা জার্মান) নিচ্ছে। সেট তত্ত্ব অনুযায়ী, ফরাসি অথবা জার্মান নিচ্ছে = ফরাসি নিচ্ছে + জার্মান নিচ্ছে - উভয় নিচ্ছে = ৪১ + ২২ - ৯ = ৬৩ - ৯ = ৫৪ জন এখন, যে ছাত্ররা কোনো কোর্সই নিচ্ছে না = মোট ছাত্র - অন্তত একটি কোর্স নিচ্ছে = ৭৮ - ৫৪ = ২৪ জনRelated questions
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