30
35
25
40
Source: Bangladesh Bank - Assistant Director - 2010
Answer: 30
Explanation:
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You should read | Questions
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?
প্রথম ও দ্বিতীয় সংখ্যার গড় ২৫। প্রথম, দ্বিতীয় ও তৃতীয় সংখ্যার গড় ৩০ হলে, তৃতীয় সংখ্যাটি কত?
দু'টি সংখ্যার গড় xy,' একটি সংখ্যা x হলে অপরটি কত?
If the average of four numbers K, 2k+3, 3k-5, and 5k+1 is 63. What is the value of k?
Amer is working in an insurance company as traveling salesman. He drove 373.5 miles on Monday, 481.6 miles on Tuesday, 392.8 miles on Wednesday, 502 miles on Thursday and 53.7 miles on Friday . What is his average traveling?
The average age of group of 10 students is 15 years. When 5 new students joined the group, the average age rise by 1 year. The average age (in years) of the new student is :
If the average of (x-3), (x-5), and (x-7) is 0, then what is the value of x ?
A train travels from New York to Chicago, a distance of approximately 840 miles, at an average rate of 60 miles per hour and arrives in Chicago at 6:00 in the evening , Chicago time . At what hour in the morning, New York City time, did the train depart for Chicago time . At what hour in the morning , New York City time, did the train depart for Chicago ? ( Chicago time is one hour earlier than New York City time.)
A motor cycle covers 40 km with a speed of 20 km/hr. Find the speed of the motor cycle for the next 40 km journy so that the average speed of the whole journey will be 30 km/hr?
একজন ছাত্র বাংলায় ৬০ এবং ইংরেজিতে ৮০ নম্বর পেল। সে অংক পরীক্ষায় কত নম্বর পেলে এই তিন বিষয়ে তার গড় নম্বর ৭৫ হবে ?
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শব্দের প্রকারভেদ ও উৎস
ঐকিক নিয়ম (Unitary Method)
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শতকরা ও লাভ-ক্ষতি (Percentage and Profit and loss)
Synonyms and Antonyms
অসমতা (Inequality)
বাক্যতত্ত্ব বা পদক্রম (Syntax)
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