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Let the rate of stream be x km/hr Then, Speed of downstream = `(25/2) + x` km/hr Speed of upstream = `(25/2) - x` km/hr (12.5 + x) = 3 (12.5 - x ) 12.5 + x = 37.5 - 3x 4x = 25 x = 6.25 km/hr
2 years ago, the average age of the family of 3 members is 13 years. A baby is born now; the average age of the family is same as before. Find the age o...
Average age of company A is 22 years and average age of both companies A and B is 14 years. If the ratio of number of employees in company A and B is 3:...
The average weight of a group of (x - 3) employees is (x + 4) kg. If a manager of weight 54 kg joins the office, then average weight of the group increa...
The average salary of a group of 12 employees is Rs. 60,000. When one employee departs, the average salary of the remaining 11 employees drops by Rs. 2,...
The average score obtained by 22 students in a class test is 68 marks. The top place was shared by 3 people who got the same score. If the lowest score ...
2040, 600, 240, 150, ?, 121.875
The average salary of an employee increased by Rs.2000 when he received a bonus of Rs.58000 in his 35th year of service. Find the average salary of the ...
The average age of a group of seven children is 10 years. From the group, two children, whose ages were 5 years more and 3 years more than the average a...
The meaning of 12 observations is 15. One more observation is included, and the new mean becomes 17. The 13th observation is.
The average of 10 observations is 60. It was realized later that an observation was misread as 39 in place of 93. The correct average is:
