Subject
পেট্রোবাংলা
Topic
গ্যাস ট্রান্সমিশন কোম্পানি লিমিটেড (সহকারী ব্যবস্থাপক) - ১০.০৩.২০১৬
On Tuesday, 30 of the students in a class took a test and their average score was 83.5. On Thursday, the other 5 students took the test, and their average score was 94. What was the average for the entire class?
On Tuesday, 30 of the students in a class took a test and their average score was 83.5. On Thursday, the other 5 students took the test, and their average score was 94. What was the average for the entire class?
ক)
83.5খ)
84.5গ)
85ঘ)
88.3ঙ)
None of theseExplanation
প্রশ্নে বলা হচ্ছে, একটি শ্রেণীকক্ষে মঙ্গলবারে 30 জন Student এর একটি Class test নেয়া হয় যাদের গড় Score ছিল 83.5। বৃহস্পতিবারে, অন্য 5 জন Student class test দিয়ে থাকে যাদের গড় Score ছিল 94. তাহলে ঐ Class এর average Score কত? দেয়া আছে 30 জন Student এর Average score = 83.5 ∴ 30 জন Student এর Total score = 83.5 x 30 5 জন Student এর Average score = 94 ∴ 5 জন Student এর Total score = 94 x 5 সুতরাং, ঐ Class এর Average score = (83.5 x 30 + 5 x 94)/(30 + 5) = (2505 + 470)/35 = 85Related questions
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