5 students of a class have an average height \( 150 \mathrm{~cm} \)... VIDEO
5 students of a class have an average height \( 150 \mathrm{~cm} \)
\( \mathrm{P} \) and variance \( 18 \mathrm{~cm}^{2} \). A new student, whose height is
W \( 156 \mathrm{~cm} \), joined them. The variance (in \( \mathrm{cm}^{2} \) ) of the height of these six students is:
(1) 16
(2) 22
(3) 20
(4) 18
๐ฒPW App Link - https://bit.ly/YTAI_PWAP
๐PW Website - https://www.pw.live
Other Videos By PW Solutions 2023-04-07 The average of \( n \) numbers \( x_{1}, x_{2}, \ldots, x_{n} \) is... 2023-04-07 If mean and standard deviation of 5 observations \( x_{1} \),
\( \m... 2023-04-07 The mean and the variance of five observations are
\( \mathrm{P} \)... 2023-04-07 If the standard deviation of the numbers \( -1,0,1, k \) is
\( \mat... 2023-04-07 The mean and variance of seven observations are 8
\( \mathrm{P} \) ... 2023-04-07 If the arithmetic mean of the following data is 7 ,
P then \( a+b= ... 2023-04-07 If \( \sum_{i=1}^{9}\left(x_{i}-5\right)=9 \) and \( \sum_{i=1}^{9}... 2023-04-07 A student scores the following marks in five tests:
\( \mathrm{P} \... 2023-04-07 A data consists of \( n \) observations: \( x_{1}, x_{2} \ldots x_{... 2023-04-07 The median of the data \( 5,6,7,8,9,10 \), is
\( \mathrm{P} \)
(1) ... 2023-04-07 5 students of a class have an average height \( 150 \mathrm{~cm} \)... 2023-04-07 The mean of five observations is 5 and their
\( \mathrm{P} \) varia... 2023-04-07 If the sum of the deviations of 50 observations from
\( \mathrm{P} ... 2023-04-07 If the average of \( a, b, c \) and \( d \) is the average of \( b ... 2023-04-07 The arithmetic of 12 observations is 15 . If two
P observations 20 ... 2023-04-07 If the standard deviation of the number \( 2,3, a \) and
\( \mathrm... 2023-04-07 If the arithmetic mean of \( 7,8, x, 11,14 \) is \( x \), then \( x... 2023-04-07 LIMITS (using \( L^{\prime} \) Hospital's rule
\( \mathrm{P} \)
If ... 2023-04-07 If the arithmetic mean of first \( \mathrm{n} \) natural numbers is... 2023-04-07 The arithmetic mean of the following frequency
\( \mathrm{P} \) dis... 2023-04-07 LIMITS (using \( L^{\prime} \) Hospital's rule
\( \mathrm{P} \) \( ...