Answer:
Step-by-step explanation:
The mode is the most number of times a number appears in a set of data points.
If there is at least one entry in the data set, then there is at least 1 mode. You can have more than 1 mode.
3, 3, 3, 5, 6, 6, 6 has 2 modes. (3 and 6)
3 has 1 mode.
[ ] set has no modes because this is the empty set.
Conclusion
A is not true. See the example above
B is true. It can have more than 1 mode
C is true for everything but the empty set.
D is simply false.
I think you are intended to pick C, but B is also true. I can't give you just 1 answer. It is a faulty question.
Answer:
the slope of y=3x/7+4/7 is M=3 over 7
Ratio = 5:2:3:8
Sum of all internal angles = 360°
5x + 2x + 3x + 8x = 360°
18x = 360°
x = 20°
Therefore,
5x = 100°
2x = 40°
3x = 60°
8x = 160°
5:2:3:8 :: 100:40:60:160.
Answer:
since the sum of all angles of a triangle is 180°
Step-by-step explanation:
so 100°+4y+25°+3y+20=180°
145°+7y=180°
7y=180°-145°
7y=35°
y=5°
Answer:
The probability that a randomly chosen light bulb will last less than 900 hours is 0.1587.
Step-by-step explanation:
The life span of these light bulbs is normally distributed with a mean of 1000 hours and a standard deviation of 100 hours
Mean = 
Standard deviation =
We are supposed to find the probability that a randomly chosen light bulb will last less than 900 hours.i.e. P(x<900)
So, 
Z=-1
P(x<900)=P(z<-1)=0.1587
Hence the probability that a randomly chosen light bulb will last less than 900 hours is 0.1587.
