Step-by-step explanation:
the first step is to find the cost price
when 20% discount=
11250*80/100= 9000
the 20% discounted price is 9000
there is still a 20% profit in this 20% discount
so Cost.Price *120/100=9000
Cost price= 7500
now its asking for discount percentage at 3% profit so first calculate price after 3% profit
7500*103/100= 7725
so discount on rs11250 required to produce 3% profit=
11250*x/100=7725
x= 68.7% discount
Answer:
99.7% of IQ scores are between 46 and 148.
Step-by-step explanation:
The Empirical Rule states that, for a normally distributed random variable:
Approximately 68% of the measures are within 1 standard deviation of the mean.
Approximately 95% of the measures are within 2 standard deviations of the mean.
Approximately 99.7% of the measures are within 3 standard deviations of the mean.
In this problem, we have that:
Mean of 97, standard deviation of 17.
What percentage of IQ scores are between 46 and 148?
97 - 3*17 = 46
97 + 3*17 = 148
Within 3 standard deviations of the mean, so:
99.7% of IQ scores are between 46 and 148.
A) 75
b) 25
You have 8 sections and 200 pupils and 200/8 is 25 so each section has 25 pupils
Answer:
12 / 7
Step-by-step explanation:
7 ( c + d ) = 12
c + d = 12 / 7
9514 1404 393
Answer:
1/2 year
Step-by-step explanation:
Put the numbers into the interest formula and solve for t.
I = Prt
8100 = 180000(0.09)t
t = 8100/16200 = 1/2
It will take 1/2 year to earn N8100 in interest at 9%.
