Subject
Bank Exam
Topic
Agrani Bank 2013 Senior Officer (Cancelled)
If 3a+5b=10 and 5a + 3b=30, what is the average (arithmetic mean) of a and b?
If 3a+5b=10 and 5a + 3b=30, what is the average (arithmetic mean) of a and b?
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4খ)
2.5গ)
2.5ঘ)
4.5Explanation
3a+5b=10 ..................... (1) 5a + 3b=30 ....................... (2) We get from (1) + (2), 8a + 8b = 40 or, a + b = 5 (Dividing both sides by 8) Now, The average would be, (a + b)/2 = (5)/2 = 2.5Related questions
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