It would take 20 hours
300/15= 20
X would have to equal 2 because when you multiply that by 7 you get 14 then add 3 and you get 17
Answer:
its positive
Step-by-step explanation:
because the line going upward
Step-by-step explanation:
Mean of the origibal set = 20
No. of terms = 10
Sum = Mean x No. of terms
= 20 x 10 = 200
The sum of additional numbers to make the new set of observstion is 4 + 8 + 12...... + 40 = 220
New Sum = 200 + 220 = 420
The no of terms stay the same
New Mean = New Sum/ N
= 420/10
= 42