1
NDA Mathematics 18 April 2021
MCQ (Single Correct Answer)
+2.5
-0.83
If the mean of a frequency distribution is 100 and the coefficient of variation is 45%, then what is the value of the variance?
2
NDA Mathematics 18 April 2021
MCQ (Single Correct Answer)
+2.5
-0.83
For which of the following sets of numbers do the mean, median and mode have the same value?
3
NDA Mathematics 18 April 2021
MCQ (Single Correct Answer)
+2.5
-0.83
The mean of 12 observations is 75. If two observation are discarded, then the mean of the remaining observations is 65. What is the mean of the discarded observations?
4
NDA Mathematics 18 April 2021
MCQ (Single Correct Answer)
+2.5
-0.83
The average of a set of 15 observations is recorded, but later it is found that for one observation, the digit in the tens place was wrongly recorded as 8 instead of 3. After correcting the observation, the average is
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