The mean of four consecutive even numbers is 15.the greatest of these numbers is a1.the least of these numbers is a2.

The greatest no a1 is 18 and smallest no a2 is 12

Step-by-step explanation:

Let the consecutive even numbers be

x, x+2 , x+4 , x+6

Given mean of four nos =15

Now mean = Sum of all observations/No of observations

15 =

4x +12 =15×4

4x + 12 = 60

Subtracting 12 both sides

4x + 12- 12 =60 - 12

4x = 48

Dividing both sides by 4

x=12

Hence the smallest no i.e. a2 is 12

Other nos be 12 +2 =14, 12+4 =16, 12 +6= 18

The greatest no i.e. a1 = 18

Hence the nos are 12, 14, 16, 18

median is the value separating the higher half of a data sample, a population or probablity distribution from the lower half.

step-by-step explanation:

say you have 3,8,7,3,1,9,8 order them from lowest to highest

if orderd it would be 1,3,3,7,8,8,9 now you take away from the lowest and the highest until you end up in the middle.

so you would remove the 1 and 9 leaving you with 5 digits remaining

when you've reached the middle that would be your answer so in this case the answer is 7

if there were two numbers left say 7 and 5 you'd and them together so 12 then divide by 2 witch would equal 6 so the answer would be 6

good luck on that project hoped i you at all

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