The average age of five members in a family is 30 years. If the present age of youngest member in the family is 10 years, what was the average age of the family at the time of birth of the youngest member?
A25
B30
C35
D40
No.1 PSC Learning App
★
★
★
★
★
Related Questions:
The average weight of 5 men is decreased by 3 kg when one of them weights 150 kg replaced by another person. This new person is again replaced by anther person whose weight is 30 kg lower than the person he replaced . What is the overall change in he average due to this dual change?
The average of first 122 odd natural numbers, is:
ഒരു ക്ലാസിലെ 40 കുട്ടികളുടെ ശരാശരി ഭാരം 50 kg. പുതുതായി 10 കുട്ടികൾ വന്നപ്പോൾ ശരാശരി 4 kg വർദ്ധിച്ചു. എങ്കിൽ പുതുതായി വന്ന കുട്ടികളുടെ ശരാശരി ഭാരം ?
The average Weight of 60 students in class is 18kgs. The Avg. Weight of boys is 15 kg and Avg. Weight of girls is 20kg. Find the Total no. of Girls in a class.
Average of five consecutive odd numbers is x and the highest odd number is minimum number in another set of seven consecutive numbers. Find the sum of the five consecutive odd numbers if the average of the seven consecutive numbers is 30