Question

The average age of 15 students is 18 years. The average age of 9 students is 12years. what is the average age of remaining 6 students?
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Answer 1

27 is the answer. The first step is to multiply 15 and 8, and 9 and 12 15*8 is 270 and 9*12 is 108 then you have to minus 270 and 108 to get the height of the 6 students. 270 minus 108 is 162 which is the height of the remaining 6 students then you have divide 162 by 6 which is 27 which is average height of the remaining 6 students