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
The answer is 8
I hope this helps!
Okay, so, you'd have to first multiply 2/3 and 2/5, which gives you 4/15.
This means that, overall, 4/15 students study French, which means that 11/15 students do not study French.
Therefore, the ratio of students that study French to students who do not study French is 4:11.
You just double the numbers
32×2=64
64×2=128
128×2=256
that's the next three items
Answer:
it is c
Step-by-step explanation: