Suppose that 90% of people are right-handed. What is the probability that at most 6 of a random sample of 10 people are right-handed?
It is known that 10% of certain articles manufactured are defective.What is the probability that in a random sample of 12 such articles,9 are defective?
A random sample of 20 people is classified in the following table according to their ages: What is the mean age of this group of people?
A box contains 10 bulbs,of which just three are defective.If a random sample of five bulbs is drawn,find the probabilities that the sample contains: Exactly on defective bulb. Exactly two defective bulbs.No defective bulbs.
An urn contains 4 blue,6 red and 8 green balls.A random sample of 4 balls is drawn. Which of thefollowing hold(s) good?(A) The chance that the sample contains two blue balls is (3)/(17)
The frequencies of alleles 'A' and 'a' in a population at Hardy-Weinberg equilibrium are 0.7 and 0.3, respectively. In a random sample of 250 individuals taken from the population, how many are expected to be heterozygous?
A random sample of 20 people is classified in the following table according to their ages : |{:("Age","Frequency"),(15-25," 2"),(25-35," 4"),(35-45," 6"),(45-55," 5"),(55-65," 3"):}| What is the mean age of this group of people?
