Subject
Bank Exam
Topic
বাংলাদেশ ব্যাংক (সহকারী পরিচালক) - ২০.১০.২০২৩
If the average of 'm' numbers is n2and that of 'n' numbers is m2, then the average of (m + n) numbers is -
If the average of 'm' numbers is n2and that of 'n' numbers is m2, then the average of (m + n) numbers is -
ক)
m + nখ)
m - nগ)
m/nঘ)
mnExplanation
Sum of m numbers = mn 2 Sum of n numbers = nm 2 ∴ Sum of m and sum of n numbers = mn 2 + nm 2 = mn(n + m) ∴ Average of (m + n) numbers = mn(n + m)/(m + n) = mnRelated questions
'আমাকে কি মাল্য দেবে দাও' কবিতার রচয়িতা কে?The profit earned by selling an article for Tk 900 is double the loss incurred when the same article is sold for Tk 450. At what price should the article be sold to make 25% profit?'পাক' এর সঠিক প্রকৃতি প্রত্যয় কোনটি?A man purchases two clocks A and B at a total cost of Tk. 650. He sells A with a 20% profit and B at a loss of 25% and gets the same selling price for both clocks. What are the purchasing prices of A and B respectively?কাজী নজরুল ইসলামের কাব্য খ্যাতিতে কোন পত্রিকার অবদান রয়েছে?Fresh grapes contain 80 percent water while dry grapes contain 10 percent water. If the weight of the dry grapes is 250 kg what is total weight when it was fresh?'শবল' এর বিপরীতার্থক শব্দ কোনটি?When 30% of one number is subtracted from another number, the second number reduces to its four-fifths. What is the ratio of the first to the second number?