<span>Answer:
The multiplication factor of increase should be inverse of the multiplication factor of decrease.
e.g. Say you have a number 100.
You increase it by 25%. The multiplication factor is 5/4 i.e. when you multiply 100 by 5/4, you get 100*5/4 = 125. This is 25% more than 100.
Now you want to decrease it by a certain % such that you get 100 back.
Basically, 100*5/4 * x = 100
So x = 4/5 (inverse of 5/4)
Hence, you decrease by 20% (the multiplication factor of 20% is 4/5)
or
Use this formula: cumulative % change = a + b + ab/100
You want the cumulative change to be 0.
a + b + ab/100 = 0
If you know that you are increasing by 25% and want to find the % by which you should decrease to get the same number,
25 + b + 25b/100 = 0
5b/4 = -25
b = -20
So you need to decrease (hence you get the -ve sign) by 20%.</span>
I find the largest number by moving backwards. Tens, ones.......
In this case it would be 0.501, because it has the most tenths. So we cross it off
Then we find the new largest number
here it is 0.15 (the difference between that and 0.105 is that 0.105 does not have any hundredths, but the 5 is in the thousandths place.
Now we find the next one
Now it is 0.105
Then you only have one remaining answer, therefore 0.015 is the smallest answer!
Information provided:
Sample size, n = 30 students
P(Male), P(m) = 55% = 0.55
P(Female), P(f) = 45% = 0.45
Now,
Mean = nP(m) = 30*0.55 = 16.5 ≈ 17 students
Variance = (sd)^2 = nP(m)P(f) = 30*0.55*0.45 = 7.425 ≈ 8 students
90 x 30 = 2,700
97 x 9 = 873
2,700 + 873 = 3,573
Answer:
ok let me slide
Step-by-step explanation:
