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2 answers:
<h2>Answer:</h2>
The mean number of vehicles owned by the families in Class B is:
2
<h2>Step-by-step explanation:</h2>We know that the mean id calculated as the average of the data entries.
Now for class B we make a frequency table as follows:
Number of vehicles(x) Number of families(y) xy
0 3 0
1 4 4
2 10 20
3 7 21
5 1 5
Total number of families= 3+4+10+7+1= 25
∑ xy= 0+4+20+21+5= 50
Hence, the Mean is:
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Answer:
b. 8,800,000.
Step-by-step explanation:
In maria study the number of cars on the road increases by 10% each year.
Total number of cars in the first year =80 million cars.
We will add 10% of 80 million to 80 milion to enable us get the number of cars for the second year.
For year 2 we have;
10% of 80,000,000+80,000,000
8,000,000 + 80,000,000
88,000,000
number of cars in year 2 = 88 million
We will add 10% of 88 million to 88 milion to enable us get the number of cars for the third year.
8,800,000+88,000,000
96,800,000
the number of cars on the road in year 3 compared to year 2 will just be the increase which is in BOLD. That is 8,800,000
<em>or simply subtract the number of cars in year 2 from that in year 3;</em>
96,800,000-88,000,000 = 8,800,000