Permutation and combination
1. Number of selections of atleast 10 articles from 19 different articles is.
A) 2^19 B) 2^18 C) 2^19 - 1 D) 2^18 - 1 E) None
3 points are randomly selected on a sphere,what is the probability that all of them lie in the same hemisphere?
Should it not be?-2πrsq./4πrsq.
Sir,kindly post the Solution of both the questions
An institute has 5 departments and each department has 50 students. If students are picked up randomly from all 5 departments to form a committee, what should be the minimum number of students in the committee so that at least one department should have representation of minimum 5 students?
5. None of the above
In how many ways can we select 3 numbers from first 20 positive integers, such that their product is always divisible by 5?
Sir, won't the answer be 580?
How many 3-letter words can be formed using the letters of the word 'INSTITUTE'?
In how many ways can you select exactly 7 letters from 3A, 4B, 2C and 1 D?
x+ y+ z=19, x≤ y≤ z, find total number of whole number solutions?
Find the number of ways to distribute 2n different balls into
(a) n equal lots
(b) equally among n children
Hello, Please solve :
How many different size rectangles are there in a square grid of 5 x 7 ?
how many words using all 8 letters of TATHAGAT can be formed such that
a) no two Ts are together?
b) first letter is not T and last letter is not A?
What should be the approach to solve the question in screenshot?
The collection of the questions are really great it will help me for my upcoming exams.