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?

If 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?

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?

There are 5% defective items in a large bulk of items. What is the probability that a sample of 10 items will include not more than one defective item?

A can solve 90% of the problems given in a book and B can solve only 70% problems. What is the probability that at least one of them will solve the problem selected at random from the book?

In a group of 400 people, 160 are smokers and non-vegetarian, 100 are smokers and vegetarian and the remaining are non-smokers and vegetarian. The probabilities of getting a special chest disease are 35%, 20% and 10% respectively. A person is chosen from the group at random and is found to be suffering from the disease. What is the probability that the selected person is smoker and non vegetarian ?

Suppose you drop a die at random on the rectangular region shown in Fig. What is the probability that it will land inside the circle with diameter 1 m ?

Suppose that 6% of the perons with blood group O are left handed and 10% of those with other blood groups are left handed. It is given that 30% of the persons have blood group O. if a left handed person is selected at random. What is the probability that the person has blood group O.