In a group of 15 high school students, 7 study Latin, 8 study French and 3 study neither Latin nor French. How many students study both Latin and French?
3
4
6
None of these
Description (বিবরণ) :
প্রশ্ন: In a group of 15 high school students, 7 study Latin, 8 study French and 3 study neither Latin nor French. How many students study both Latin and French?
ব্যাখ্যা:
The number of students studying Latin or French n(LUF) = 15 - 3 = 12
Now, n(LUF) = n(L) + n(F) - n(LꓵF)
or, n(LꓵF) = n(L) + n(F) - n(LUF) = 7 + 8 - 12 = 3
