Answer:
The mean is <em>c). 67</em>
Step-by-step explanation:
You must use the weighted average in order to calculate the mean, given that we know the frequency distribution.
In order to to this, you calculate the proportion that the frequency on each interval represents out of the total frequencies; in other words, this is the weight value:
These are the factors by which you will multiply the speed so that you can get the average speed in terms of their weight. For each interval of speed, let's take the average between the minimum and the maximum as the value of speed.
After these two transformations, your table will look as this:
Then, you multiply the average speed times its weight value, finding the weighting factor:
The final step is to sum all the weighting factors, which gives you a total of 67 mph. This is your weighted average.
Answer:
x = 95
Step-by-step explanation:
The total degree of a circle is 360. The twp arcs on each side of the parallel lines are equal.
Subtract 135 and 35 from your total
<em>360 - 135 - 35 = 190</em>
Divide your answer by 2
<em>190 ÷ 2 = 95</em>
54 will go in the box that says divisible by 6 and 9. 72 would go under the one that says divisible by 2 and 6. 84 would do under the divisible by 2 and 6. 90 goes under divisible by 5 and 9. and 96 goes under divisible by 6 and 9.
7/6 i think! hope this helps
60 divide dos by 15 is 4, so it takes 4 minutes for each person to empty it.
25 x 4 = 100, so the answer would be 100 minutes.