Supose that 80 % of all families own a elevision set. If 10 families are interviewed at random, find the probability that seven famileis own a television set .

80% of all families own a television set. If 10 families are interviewed at random, then the probability that at most three families own a television set is

Suppose that 80% of all families own a television set. If 5 families are inervised at random, find the probability that : (a) three families own a television set. (b) at least two families own a television set.

A company selected 2300 families at random and surveyed them to determine a relationship between income level and the number of vehicles in a home The information gathered is listed in the table below : if a family is chosen at random, find the probability that the family is: (i) earning Rs.7000-13000 per month and owning exactly 1 vehicle (ii) owning not more than one vehicles. more than 2 vehicles (lii) earning more than Rs. 13000 and owning 2 or (iv) owning no vehicle

In a locality 100 families were chosen at random and the following data was collected: |{:("Number of childeren"," 0 1 2 3 4 or more"),("is each family",),("Number of families"," 3 40 45 12 0"):}| If a family is chosen at random, find the probability that the chosen family has 3 or more children.

In a locality 100 families were chosen at random and the following data was collected: |{:("Number of childeren"," 0 1 2 3 4 or more"),("is each family",),("Number of families"," 3 40 45 12 0"):}| If a family is chosen at random, find the probability that the chosen family has 3 or more children.

From the set of all families having three children, a family is picked at random If the eldest child happens to be a girl, find the probability that she has two brothers.

In a large metropolitan area, the probabilities are .87,.36,.30 that a family (randomly chosen for a sample survey) owns a colour television set, a black and white television set, or both kinds of sets. What is the probability that a family owns either anyone or both kinds of sets ?

In a certain town, 60% of the families own a car, 30% own a house and 20% own both a car and a house. If a family is randomly chosen, what is the probability that this family owns a car or a house but not both?

In a certain town, 60% of the families own a car, 30% own a house and 20% own both car and house. If a family is randomly chosen, then what is the probability that this family owns a car or a house but not both?