Subject
Bank Exam
Topic
Trust Bank Ltd. - Management Trainee Officer - 2016
If x is the average (arithmetic mean) of m and 9, y is the average of 2m and 15, and z is the average of 3m and 18, what is the average of x, y, and and z in terms of m ?
If x is the average (arithmetic mean) of m and 9, y is the average of 2m and 15, and z is the average of 3m and 18, what is the average of x, y, and and z in terms of m ?
ক)
m + 6খ)
m + 7গ)
2m + 14ঘ)
3m + 21ঙ)
NoneExplanation
Solution: অনুবাদঃ যদি m এবং 9 এর গড় x হয়, 2m এবং 15 এর গড় y এবং 3m এবং 18 এর গড় z হয় তবে x, y, এবং z এর গড় m এর সাপেক্ষে কত হবে ? এই প্রশ্নে থেকে 3টি সমীকরণ গঠন করা যায় । আসুন আমরা সমীকরণ গঠন করে অঙ্কটির সমাধান করি । => m + 9 = 2x .............. (i) => 2m + 15 = 2y .......... (ii) এবং => 3m + 18 = 2z ......... (iii) এখন, (i), (ii) এবং (iii) নং সমীকরণ যোগ করি । 2x + 2y + 2z = m + 9 + 2m + 15 + 3m + 18 => 2(x+y+z) = 6m + 42 => 2(x + y + z) = 2(3m + 21) => x + y + z = 3m + 21 এখন, 3m + 21 কে 3 দিয়ে ভাগ করলেই x, y, z এর গড় বের হবে । x, y, z এর গড় = = m + 7.Related questions
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