Question
The ratio of age of ‘B’ after 5 years from now and
age of ‘C’ 4 years ago from now is 7:4, respectively. The present age of ‘C’ is 50% of the present age of ‘A’. If present age of ‘A’ is 72 years then find the present age of ‘B’.Solution
Present age of ‘C’ = 0.5 × 72 = 36 years 4 years ago from now, age of ‘C’ = 36 – 4 = 32 years 5 years hence from now, age of ‘B’ = 32 × (7/4) = 56 years Present age of ‘B’ = 56 – 5 = 51 years
The average cost price of 14 pens (having equal cost price) decreased by Rs.2, when one of the pen is replaced by a new pen having cost price of Rs.80. ...
There are 15 numbers such that average of first 12 numbers is 65 while the average of last five numbers is 76. Find the 12th number, if the ratio betwee...
The average of three numbers is 21. The first number is double the second, and the third number is double the first. Calculate the sum of the first and ...
The average of 17 numbers is 80. The first seven numbers have an average of 100, and the last five numbers have an average of 72. The tenth number exce...
3 years ago, the average age of a family of 5 members was 17 years. A baby being born, the average age of the family is 17 years. The present age of the...
In a company, the average age of 40 employees is 20 years. When the ages of two managers, one 'a' years old and the other 'a + 10' years old, are includ...
15 years ago, the average age of all the 80 teachers of the college was 50 years. 8 years ago, the principal has retired from her post at the age of 60 ...
The average score of a group of 50 students is 90. When the scores of 4 students—X, Y, Z, and W—are excluded, the average of the rest falls by 2. If...
A batsman had an average of 42.8 over 15 innings. In his next three innings, he made 55, 103, and 47 runs. What is his updated batting average?
- The average of the present age of 'S' and 'T' is 40 years. If the ratio of the age of 'S' 5 years ago to the age of 'T' 5 years hence is 3:5, then find the...
Relevant for Exams:
