Question

If the mean of the observations X, X +3, X +5, X +7, X +10 is nine then find the mean of the Last three observations

Answer 1

Answer:

34/3

Step-by-step explanation:

mean = x+x+3+x+5+x+7+x+10 /5 =9

=5x+25/5=9

5x+ 25=45

5x=45-25

5x=20

x=4

put value of x in last three numbers we get x+5 x+7 nd x+10 =9, 11 nd 14 respectively

mean =9+11+14 /3

=34/3