the average age of 40 students of a class is 15 years. when 10 new students are ad9 the average is increased by 0.2 years. the average age of new students is:
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this is your answer mate!!!
Step-by-step explanation:
Sum of the ages of 40 students 40*15 = 600
Sum of the ages of 40+10 students 50*15.2 = 760
Sum of the ages of 10 new students = 760-600= 160
Average 160/10 = 16 yrs
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