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The average age of 40 students of a class is 18 years. when 20 new students are admitted to the same class,the average age of the class is increased by 6 months. the average age of newly admitted students is |
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Answer» average AGE of 40 students = 18 years = 216 months. total age of 40 students = 40*18 = 720 years = 8640 months. when 20 students admitted, the average age of 60 students = 18.5 years = 222 months. and the total age of the 60 students = 1110 years = 13320 months. then, total age of 20 students = 1110 - 720 = 390 years = 4680 months. average age of 20 students = 390/20 years, or 4680/20 months = 19.5 = 19 years 6 months, or 234 months. |
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