My question is: A Statistics student wants to find out the average daily allowance of the middle school students. According to his survey, 2/3 of the students receive an average of $6 allowance per day while the rest gets an average of $4 a day. If he surveyed 60 students, what is the total amount of money those 60 students get in a day? Your thoughts:
There are 60 students x 2 / 3 = 40 students who have a $6 daily allowance. While there are 60 students - 40 students = 20 students who have a $4 daily allowance. The sum of the allowances of the 40 students who received $6 daily is 40 students x $6 / day = $240. The sum of the allowances of the 20 students who received $4 daily is 20 students x $4 / day = $80. The total daily amount of money of those 60 students is $240 + $80 = $320. The final answer: 320.