Question

frist three numbers average is 18. then last three numbers average is 14 and frist and last sum is 16 then find last numbe​

Answer 1

Answer:

average of first 3 =15

sum of 1st 3 no. = 3×15=45

& also last 3 no. =16

sum of last 3 =16×3=48

in it last no is 19

so middle two =48-19=29

so 29 minus from first 3

so 1st no =45 -29

1st no. =16

so

let 2nd no be x and 3rd be 29 -x

so

according to the 1st conditions

16 +x+29 -x =45

x + 29 - x = 29

let x be 15

so 3rd no be 14

this your answer