A) A grocer bought 20 kg of sugar at Rs 70 per kg. He sold 15 kg of sugar at Rs 75 per kg and the remaining quantity at Rs 69 per kg. Find his profit or loss percent

5%

Step-by-step explanation:

A grocer bought 20 kg of sugar at Rs 70 per kg. The total amount spent will be: = 20kg × Rs70 = Rs1400

He sold 15 kg of sugar at Rs 75

per kg and the remaining quantity at Rs 69 per kg. This will be:

= (15 × Rs75) + (5 × Rs69)

= Rs1125 + Rs345

= Rs1470

Gain = Rs1470 - Rs1400 = Rs70

Percent gain = Gain/cost price × 100

= 70/1400 × 100

= 1/20 × 100

= 5%

The profit percent is 5%

29933333.33

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;