Do 25 + 25 + n + n.
n=18
The bottom question is also
n=18
Answer:
Step-by-step explanation:
Let
n------> a number
we have
n represent the 100%
so
by proportion
Answer:
The mean will stay the same.
The standard deviation will decrease.
Step-by-step explanation:
For the 5 cards, she has received, the mean will be:
μ=(∑x)/n
=125/5
=25
The mean is 25 and the standard deviation is 10.
σ=10
If a new card is received with $25, then the sum will be $150
So the new mean will be:
μ'=(∑x)/n
=150/6
=25
And the new standard deviation will be:
σ'= 9.12
We can clearly see that
μ= μ'
and
σ> σ'
So the mean will remain the same and standard deviation will decrease.
.
Answer:
25
Step-by-step explanation:
100 divided by 4 = 25
