Advertisements
Advertisements
प्रश्न
Choose the most appropriate option:
A library has an average of 510 VIS1tors on Sunday and 240 on the other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is
विकल्प
250
280
276
285
उत्तर
285
Explanation:
Since the month begins with a Sunday. So, there will be five Sundays in the month.
The required average`=(5xx510+240xx25)/30=285`
APPEARS IN
संबंधित प्रश्न
Choose the most appropriate option.
The average weight of three men ‘X’, ‘Y’ and ‘Z’ is 75 kgs. Another man ‘A’ joins the group and the average weight now becomes 80 kgs. If another person ‘B’ whose weight is 5 kgs more than ‘A’ replaces ‘X’, then the average weight of ‘Y’, ‘Z’, ‘A’ and ‘B’ will be 85 kgs. What is the weight of ‘X’s?
When numbers are associated with weights, then obtanied mean is said to be
The ratio between the present ages of Anu and Balbir is 5: 3, respectively. The ratio between Anu's age 4 years ago and Balbir's 4 years hence is 1: 1. What is the ratio between Anu's age 4 years hence and Balbir's age 4 years ago?
Four years ago, the ages of Ritu and Reena were in the ratio 5: 6 respectively. Eight years from now the respective ratio of their ages will be 8: 9. What is the sum of their ages at present?
The sum of ages of a mother and daughter is 45 years. Five years ago, the product of their ages was four times the mother's age at that time. The present age of the mother is
The average age of A, B, and C is 25 years. The Ratio of their ages is 3: 5: 7. Find the age of A.
The average marks of a student in ten papers are 80. If the highest and the lowest score are not considered the average is 81. If his highest score is 92, what is the lowest score?
If the average marks of three batches of 55, 60 and 45 students are respectively 50, 55 and 60, then the average marks of all the students are
In the first 10 overs of a cricket game, the run rate was only 3.2. What should be the run rate in the remaining 40 overs to reach the target of 282 runs?
The mean of 100 items was found to be 30. If at the time of calculation, two items were wrongly taken as 32 and 12 instead of 23 and 11, correct mean is
