Let the mean and variance of the frequency distribution x : {x}_{1}=2 {x}_{2}=6 {x}_{3}=8 {x}_{4}=9 f : 4 4 α β be 6 and 6.8 respectively. If {x}_{3} is changed from 8 to 7 , then the mean for the new data will be: [27 Jul 2021 Shift 2]

JEE Main 27 July 2021 Shift 2 Solved Paper

Section: Mathematics

Question : 68 of 90

Marks: +1, -0

Let the mean and variance of the frequency distribution

x :	x1=2	x2=6	x3=8	x4=9
f :	4	4	α	β

be 6 and 6.8 respectively. If x3 is changed from 8 to 7 , then the mean for the new data will be:

[27 Jul 2021 Shift 2]

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