B) A retailer sold an article to a customer at a loss of 10%. The customer purchased
it for Rs 25,425 including 13% VAT. Calculate the cost price of the article to the
retailer.

those who do this question i will mark us as a brilliant

loss=10%

sp with vat=rs25425

sp=sp with vat-vat%of sp=rs25425-13/100×sp

sp+13/100×sp=rs25425

(100sp+13sp)/100=rs25425

113sp=rs2542500

sp=rs2542500/113=22500

cp=sp+loss %of cp

cp-10/100×cp=22500

(10cp-cp)/100=22500

9cp=2250000

cp=2250000/9=250000

whatvare the choices

step-by-step explanation:

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;