Answer:
Mean = 0.2(100) = 20
Variance = 0.2×0.8×100 = 16
Standard deviation = 4
Yes, np > 5 & nq > 5
Answer:
The number of ways are there to paint the four buildings is 48.
Step-by-step explanation:
I) let the first building be any color. Therefore the first building can be painted with any of the 4 colors.
Therefore the first building can be colored in 4 ways.
ii) the second building can be colored in 3 ways since it cannot be colored the
same color as the first building.
iii) the third building can also be colored in 3 ways.
iv) the last building can be colored in 2 ways because it cannot be the same color as the first building or the color of the adjacent building.
Therefore the total number of ways the buildings can be colored = 4 3 3 2 = 48.
Answer:
y = 160 - x
Step-by-step explanation:
Given :
Maximum text character = 160
x = number of typed characters
y = Number of characters left or unused characters
Unused characters = 160 at the start of a fresh message page, which reduced as characters are being typed.
Hence,
Unused characters = (maximum characters - number of typed characters)
y = 160 - x