Math Answers

Box A and Box B both contain the numbers 2, 4, 6 and 8. Construct the probability mass function and draw the histogram of the sum when one number from each box is taken at a time, with replacement.

rina walks from home to school everyday how far is the school from her house if it takes 10 minutes to walk at a pace of 50 m/mins

A company producing lubricating oil that the average content of the containers is 20 litres. Test this claim if a random sample of ten containers are 20.5, 19.4, 20.2, 19.8, 20.6, and 19.6 litres .assume normal distribution and use 1% level of significance

the mean serum cholesterol level of a large population of overweight children is 220 mg per deciliter (mg/dl), and the standard deviation is 16.3 mg/gl. If a random sample of 35 over which children is selected, find the probability that the mean will be between 220 and 222 mg/ dl. Assume the serum cholesterol level variable is normally distributed.

A population consists of the values (1, 2, 4). List down all the possible samples of size 2 that can be drawn from this population with replacement.

A population consists of the values (1, 2, 4). List down all the possible samples of size 2 that can be drawn from this population with replacement.

2. A low pressure area implies a coming stormconverse, inverse and contra positive 

A town has a population of 2000 and grows at 4% every year. What will be the population after 15 years, to the nearest whole number?

1. A certain research center requires an IQ score above 131.5.

Assume IQ scores are normally distributed with mean of 100 and standard

deviation of 15. Nine candidates took IQ tests. Find the probability that the IQ

score of a randomly chosen individual is at least 131.5?

2. A Company which produces cigarettes claims that it has now reduced the

amount of nicotine. The Supporting evidence consists of a random sample of 40

cigarettes and gives mean amount of nicotine 0.941 g and a standard deviation of

0.313g. What is the probability that mean nicotine amount is greater than 0.882 g.

Number plates in an Arab country consist of 3 letters (chosen from a specified set of 20 letters from the Arabic alphabet) and 4 digits (from 0 to 9).

Find the probability of a plate having identical letters.

Find the probability of a plate having identical digits.