Question

10. The mean of 50 numbers is 18, the new mean will be _____ if each observation is increased by 4

Answer 1

Answer:

72

Step-by-step explanation:

Number of Observation = 50

Mean of Observations = 18

Let the sum of Observation be = x

Mean = x/50 = 18        

If each observation is increased by 4, then;

New Mean = 4(x)/50 = ?

From old mean; we get x = 50*18 = 900

=> 4(900)/50 = New mean

=>New mean = 4(18) = 72

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Answer 2

Answer:

22

Step-by-step explanation:

x/50 = 18

x = 50 X 18 = 900

new mean

increased by 4 =

50 X 4 = 200

900 + 200 = 1100

1100/50 = 22

hence the new mean will be 22

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