Correct option is A
Mean = 492
Number of observations = 13
Total sum = 13 × 492
= 6396
Sum of known numbers:
511 + 512 + 514 + 505 + 513 + 507 + 509 + 504 + 512 + 513 + 507 + 511
= 6118
Let unknown value = X
6118 + X = 6396
X = 6396 − 6118
X = 278
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Question
If the arithmetic mean of 13 observations 511, 512, 514, 505, 513, 507, 509, 504, 512, 513, X, 507, 511 is 492. Find the value of "X" in the observations.
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Similar Questions
- 1)
Ramesh gets a discount of 30% on his purchase bill of Rs.9100. What is the total discount he got? (In Rs)
- 2)
If the arithmetic mean of 13 observations 511, 512, 514, 505, 513, 507, 509, 504, 512, 513, X, 507, 511 is 492. Find the value of "X" in the observations.
- 3)
The average weight of 263 fertilizer bags is 63 kg. If the weight of the box(in which the fertilizer bags are kept) is included, the calculated average weight per fertilizer bag will increase by 0.8 kg. What is the weight of the box? (In kg)
- 4)
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- 5)
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- 6)A and B are parents of C and A is elder than B. The father A’s age is not more than 4 times that of C’s age and the mother B’s age is not less than 3 times the age of C. If C’s age is not less than 7 years and not more than 10 years, then the maximum possible age difference between A and B is :
- 7)A student found the 1357th day from 1st March, 1998 as Friday. Then the immediate date after
1st March, 1998 which falls on Thursday is : - 8)The graph given below shows the sale of cars (in thousands of units) by a car-making company A in the years 2020 through 2023 and the table given below shows the ratio of production of cars to sales in the years 2020 through 2023. Study the graph and table carefully and answer the question.
If the average production in these four years is x and the average sales in these four years is y, then
x : y is : - 9)A watch loses 2 minutes for every 12 hours. The watch is set to the right time at 11 a.m. on Monday. At the time 11 p.m. on the immediate coming Friday, the faulty watch shows the time :
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