Answer:
<h2>B. 7.1</h2>
Step-by-step explanation:
Given the sample data 2 6 15 9 11 22 1 4 8 19, before we can get the standard deviation, we need to first calculate the mean.
mean = 2 +6 +15 +9 +11 +22 +1 +4 +8 +19/10
mean = 97/10
mean = 9.7
Standard deviation for ungrouped data is expressed using the formula;
<em>Hence the standard deviation of the sample data is 7.1</em>
Answer:
Aunt drove 4 hours
Uncle drove 6 hours.
Step-by-step explanation:
Equations:
580 = 55/x + 60/y
600 = 55x + 60y
Happy Holidays!
Answer:
the correct answer is b in case of number 1
STEP 1
Find total number of pieces
75 per bag * 3 bags= 225
STEP 2
Divide total number of pieces by 7 friends
225 ÷ 7= 32.14
STEP 3
32 * 7 friends= 224 pieces divided among friends
STEP 4
225 total pieces - 224 pieces divided among friends= 1 pieces left for him
ANSWER: Each friend gets 32 pieces and he has 1 piece left for himself.
Hope this helps! :)
Profit from one yearbook = 35-7=28
14000/28=500 yearbooks they must sell before their business breaks even.