The average age of a husband and a wife is 23 years when they were married five years ago but now the average age of the husband, wife and child is 20 years(the child was born during the interval). What is the present age of the child?

Related Mcqs:

The average age of M boys is ‘b’ years and of ‘n’ girls ‘c’ years. The average age of all together is_________?

A. (mb – nc)/ (m + n) years B. (mb + nc)/ (m – n) years C. (mb + nc)/ (m + n) years D. (mb – nc)/ (m – n) years...

The average weight of 25 persons sitting in a boat had some value. A new person added to them whose weight was 46 kg only. Due to his arrival, the average weight of all the persons decreased by 5 kg. Find the average weight of first 25 persons?

A. 55 kg B. 62 kg C. 56 kg D. None...

The average of the marks of 12 students in a class is 36. If the marks of each student are doubled, find the new average?

A. 72 B. 45 C. 37 D. 79...

A student scored an average of 80 marks in 3 subjects: Physics, Chemistry and Mathematics. If the average marks in Physics and Mathematics is 90 and that in Physics and Chemistry is 70, what are the marks in Physics?

A. 60 B. 64 C. 72 D. 80...

The arithmetic mean of the scores of a group of students in a test was 52. The brightest 20% of them secured a mean score of 80 and the dullest 25% a mean score of 31. The mean score of remaining 55% is___________?

A. 45 B. 50 C. 51.4 approx. D. 54.6 approx....