The mean of the numbers a, b, 8, 5, 10 is 6 and the variance is 6.80 . Then which one of…
Mathematics · JEE Main · NTA Exams — Statistics and Probability
The mean of the numbers a, b, 8, 5, 10 is 6 and the variance is 6.80 . Then which one of the following gives possible values of a and b ?
- a = 3, b = 4
- a = 0, b = 7
- a = 5, b = 2
- a = 1, b = 6
Answer
(A) a = 3, b = 4
Sign up free on Edukali to view the step-by-step worked solution and practice thousands of similar questions.
Related practice questions
- A Urn contains ‘m’ white and ‘n’ black balls. Balls are drawn one by one till all the balls are drawn…
- A and B are two events. Odds against A are 2 : 1. Odds in favour of A B are 3 : 1. If x P(B) y , then the…
- Three houses are available in a locality. Three persons apply for the houses. Each applies for one house…
- Statement–I: The average marks of boys in a class is 52 and that of girls is 42 . The average marks of boys…
- The A.M. of n observations is M. If the sum of n–4 observations is a, then the mean of remaining 4…
- Three distinguishable balls are distributed in three cells. The probability that all three occupy the same…
- Let a, b, c, d and e be the observations with mean m and standard deviation s. The standard deviation of the…
- If in a frequency distribution the mean and median are 21 and 22 respectively, then its mode is approximately
More Statistics and Probability questions · Browse all practice questions