Subject
পেট্রোবাংলা
Topic
গ্যাস ট্রান্সমিশন কোম্পানি লিমিটেড (সহকারী ব্যবস্থাপক) - ১০.০৩.২০১৬
If the average of a and b is 45 and the average of b and c is 35, then (a – c)=?
If the average of a and b is 45 and the average of b and c is 35, then (a – c)=?
ক)
5খ)
10গ)
20ঘ)
30ঙ)
NoneExplanation
প্রশ্নে বলা হচ্ছে, a ও b গড় 45 এবং b ও c এর গড় 35 হলে (a - c) = ? দেয়া আছে, (a + b)/2 =45 ⇒ a + b = 90 ∴ b = 90 - a আবার, (b + c)/2 = 35 ⇒ b + c = 70 ⇒ 90 - a + c = 70 ⇒ - a + c = -20 ⇒ a - c = 20 ∴ a - c = 20Related questions
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