(asking for the second time!(Permutation and Comb

Question

(asking for the second time!(Permutation and CombinationWe have integers from 1 to 100Number of ways of selecting two numbers such that there difference is atmost10.I did this by bijection method and I am getting the answer 100C2-91C2.I don’t know the answer as “None of these” is the correct answer But I have to confirm.So please someone solve it and tell me the answer.

Vijay Mukati · Accepted Answer

Dear Student, If you choose any number between1and90(inclusive), and call itx, you can choose any number betweenx+1andx+10, which gives us10choices for each. If you choose91, for example, you have9 numbers to choose from (i.e.92,93,⋯100). Similarly,93gives us8choices,94gives us7, and so forth, until99gives us only1choice. Hence,90x10+9+8+7+⋯+1=945.

Algebra> (asking for the second time!(Permutation ...

RON , 9 Years ago

Vijay Mukati

Provide a better Answer & Earn Cool Goodies

LIVE ONLINE CLASSES

Ask a Doubt

What is a binomial expression?

algebra

Can we divide two vectors? If this is possible then how?

algebra

How do you write “the product of 18 and q” as an algebraic expression?

algebra

दहावीच्या आय सी एस इ विद्यार्थ्यांनी पुढे काय करायला पाहिजे

algebra

Find the least number of square tiles by which the floor of a room of dimensions 16.58 m and 8.32 m can be covered completely. why HCF and not LCM as “least” keywor dis given?

algebra

Algebra> (asking for the second time!(Permutation ...

RON , 9 Years ago

Vijay Mukati

Provide a better Answer & Earn Cool Goodies

LIVE ONLINE CLASSES

Ask a Doubt

Other Related Questions on algebra

What is a binomial expression?

algebra

Can we divide two vectors? If this is possible then how?

algebra

How do you write “the product of 18 and q” as an algebraic expression?

algebra

दहावीच्या आय सी एस इ विद्यार्थ्यांनी पुढे काय करायला पाहिजे

algebra

Find the least number of square tiles by which the floor of a room of dimensions 16.58 m and 8.32 m can be covered completely. why HCF and not LCM as “least” keywor dis given?

algebra