There are 3 sections with 5 qns each. If three qns are selected from each section, then in how many ways this selection can be done..
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we have to select three questions from each section so the chances are 5C3.5C3.5C3=1000
from first 5 questions a que can be selected in 5 ways
from second set of questions a que can be selected in 5 ways
similarly from third set also 5 ways
ans is 5*5*5=125 ans
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