Question

1. The average of 9 observations is 45.5. If one new
observation is added to the previous observations,
then the new average become 47. The new observa-
tion is :​

Answer 1

Answer:

60.5

Step-by-step explanation:

the average of 9 observations is 45.5 so the total is 9*45.5=409.5

now the new mean is 47 with the addition of 1 more observation, so the equation for mean becomes

((409.5+x)/10)=47

409.5 + x=470

x=60.5 which is the new observation