5 students of a class have an average height 150 cm and variance 18 cm – InterviewSolution

1.	5 students of a class have an average height 150 cm and variance 18 cm2. A new student, whose height is 156 cm joined them. The variance (in cm2) of the height of these six students is:
Answer» 5 students of a class have an average height $150 cm$ and variance $18 {cm}^{2}$ . A new student, whose height is $156 cm$ joined them. The variance $(in {cm}^{2})$ of the height of these six students is:

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