If the mean and variance of a binomial distribution are 5 and 4, respectively, then the value of n is:
The correct answer is A
The average age of 32 children and their teacher's age are 28 years. If the teacher's age is excluded, the average reduces by 1. What is the teacher's age?
Find the average of the following sets of numbers.
693, 456, 876, 532, 934, 691, 596, 398, 682
The average salary of 36 employees ( Teachers+principals) in a School is Rs.10,375. A Principal in the School receives a salary that is 125% higher than...
The average number of books on history, polity and geography in a library is 190, and the average number of books on history and geography is 160. If th...
There are 15 numbers such that average of first 12 numbers is 50 while the average of last five numbers is 60. Find the 12th number, if the ratio betwee...
A man takes 3.5 hours to reach a friend's house, which is 50 km away from his residence. He returns home traveling at 20 km/h. Ca...
The average of 18 numbers is 12. If each number is increased by 2, what will be the mean of the new set of numbers?
Average weight of 14 nurses is 46 kg. If the weight of one more nurse is included, then average weight is increased by 1 kg. Find the weight of the newl...
In a cricket match the captain of one of a team scored 27 runs more than the average runs scored by the remaining 7 batsmen of that team who batted in t...
The average of first three numbers of a set of six numbers is 60 .The average of the second, third and fourth numbers is 20 and the average of the third...
