The average age of a set of 30 persons is 35. The average of 20 persons is 18. What will be the average of the remaining?
A57.5
B58
C69
D58.5
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Related Questions:
Average age of 8 men is increased by 3 years when two of them whose ages are 30 and 34 years are replaced by 2 persons. What Is the average age of the 2 persons?
The average monthly expenditure of a family for the first four months is Rs. 2750, for the next three months is Rs. 2940 and for the last five months Rs. 3130. If the family saves Rs. 5330 during the whole year, find the average monthly income of the family during the year.
What is the average of even numbers from 50 to 250?
ഒരു കുടുംബത്തിലെ 5 അംഗങ്ങളുടെ ശരാശരി പ്രായം 23 വയസ്സാണ്. ഇതിൽ ഏറ്റവും പ്രായം കുറഞ്ഞ ആളുടെ പ്രായം 11 വയസ്സാണ്. ഈ കുടുംബത്തിൽ ബാക്കിയുള്ളവരുടെ പ്രായത്തിന്റെ ശരാശരി എത്രയാണ് ?
What is the average of even numbers from 1 to 50?