jee-main 2023 Q73

jee-main · India · session1_25jan_shift1 Measures of Location and Spread
The mean and variance of the marks obtained by the students in a test are 10 and 4 respectively. Later, the marks of one of the students is increased from 8 to 12 . If the new mean of the marks is 10.2 , then their new variance is equal to:
(1) 4.04
(2) 4.08
(3) 3.96
(4) 3.92 
The mean and variance of the marks obtained by the students in a test are 10 and 4 respectively. Later, the marks of one of the students is increased from 8 to 12 . If the new mean of the marks is 10.2 , then their new variance is equal to:\\
(1) 4.04\\
(2) 4.08\\
(3) 3.96\\
(4) 3.92
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