14. The mean of 20 observations is 30. If 5 is added to every observation, the new mean will be a) 35 b) 250 c) 30 15 The range of the data 14 27.29.61.45. 15. 9. 18 is d) None of these
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Step-by-step explanation:
Given Mean of 10 observations is 20
⟹Sum of 10 observations is S=20×10=200
If each observation is added by 5 Then sum of observations is added by 5×10=50
⟹S
′
=200+50=250
Mean of new observation is
10
S
′
=
10
250
=25
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Answer:
14) Given Mean of 10 observations is 20
⟹Sum of 10 observations is S=20×10=200
If each observation is added by 5 Then sum of observations is added by 5×10=50
⟹S′ =200+50=250
Mean of new observation is S/10 = 250/10
=25
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