Mean of 5 observations is 7 . If four of these observations are 6, 7, 8, 10 and one is…
Mathematics · JEE Main · NTA Exams — Statistics and Probability
Mean of 5 observations is 7 . If four of these observations are 6, 7, 8, 10 and one is missing, then the variance of all the five observations is
- 4
- 6
- 8
- 2
Answer
(A) 4
Sign up free on Edukali to view the step-by-step worked solution and practice thousands of similar questions.
Related practice questions
- A, B and C are contesting the election for the post of secretary of a club which does not allow ladies to…
- Given below are two statements. One is labelled as Assertion and the other is labelled as Reason. STATEMENT …
- A Urn contains ‘m’ white and ‘n’ black balls. Balls are drawn one by one till all the balls are drawn…
- Cards are drawn one by one at random from a well shuffled pack of 52 cards until 2 spades are obtained for…
- Assume that in a family, each child is equally likely to be a boy or a girl. A family with three children is…
- There are n-persons sitting in a row. Two of them are selected at random. The probability that two selected…
- The mean of 100 observations is 50 and their standard deviation is 5 . The sum of squares of all observations…
- The median of the variables x+4, x- 7 2 , x- 5 2 , x-3, x-2, x+ 1 2 , x- 1 2 , x+5(x>0) is
More Statistics and Probability questions · Browse all practice questions