Question
The average age of 19 girls is 45 years. If the age of
one more girl is added the average decreases by half a year. What is the age of new girl?Solution
Total age of 19 girls = 19 times; 45 = 855 years If the age of one more girl is added the average decreases by half a year, there4; Total age of 20 girls = 44.5 times; 20 = 890 Now, the age of new girl = 890 ndash; 855 = 35 years
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