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The average age of 15 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?
The average of the first and second numbers is 45, while the average of the second and third numbers is 55. If the sum of the first and third numbers is...
Average age of a class of 41 students is 17 years. Average age of the class is increased by 18 months if the age of the teacher is included. Find the ag...
The average of four numbers (z+16), (y+15), (y-25) and 1.2z is (y-6). If one more number which is 144 is added then the new average will be (y-1). The v...
What is the average of odd numbers greater than 10 but less than 30?
What is the average of the squares of the first 47 natural numbers?
The average mark obtained by 160 candidates in a certain examination is 55. If the average marks of passed candidates are 60 and that of the failed cand...
The average height of a volleyball team of 12 Brazilian players is 185 cm. If the height of the coach is included, the average height increases by 3 cm....
