VNS,Math
posted by Nahar .
Mr. Bobby bought 50 shares at $60, and 2 months later purchased 25 shares a $56.at what price should he purchase 25 additional shares in order to have an average price $58 per share?
The average age of a family of 6 members is 25 years. The average of the family after a 45 years old members leaves is?
In a course a students final exam is weighted twice as heavily as his midterm exam.If a student receives a score of 84 on his final exam and 90 on his midterm exam ,what is the average for the course?

#1: If the price is x, then we must have
50*60 + 25*56 + 25x = 58(50+25+25)
#2: (6*2545)/5
#3: (90+2*84)/3
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Mr. Bobby bought 50 shares at $60, and 2 months later purchased 25 shares a $56.at what price should he purchase 25 additional shares in order to have an average price $58 per share?