Question
The average age of a group of 70 students is 14 years. If three students whose ages are 22years, 20years, ________ years is replaced with three new student whose ages are 19 years, ______ years, and 32 years, then the new average age is increased by 0.4 years.
The average age of a group of 70 students is 14 years. If three students whose ages are 22years, 20years, ________ years is replaced with three new student whose ages are 19 years, ______ years, and 32 years, then the new average age is increased by 0.4 years.
I. 17, 36
II. 22, 41
III. 15, 34
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