(Q). In how many ways 5 distinct volume of chemistry and 7 distinct volume of Botany book can be arranged on a bookshelf such that no two chemistry books are together ?Sol:-•B₁•B₂•B₃•B₄•B₅•B₆•B₇•7 distinct botany books can be arranged in 7! ways. This will create 8...
(Q). In how many ways 15 students can be seated on 20 seats in a row ?Sol:- First select then arrange15 seats can be selected out of 20 seats in ²⁰C₁₅ ways. Now 15 students can be arranged in these 15 seats in 15! ways.Hence total number of ways = ²⁰C₁₅.15! ...
(Q). How many regular polygons can be formed by joining the vertices of a 36 sided regular polygon?Sol:- Since polygon is regular, so all its 36 vertices lie on a circle & are equidistant to its adjacent vertices.now consider 36 sided regular polygon.a new regular...
(Q). In how many ways two queens can be placed on a 8×8 chess board such that they are not able to attack each other (Queens can attack in the same row/column/diagonal)? (i). one queen is black & other queen is white (ii). both queens are identical. Solution:- we...
(Q). In how many ways two identical kings can be placed on a 8×8 chess board such that they are not on adjacent squares? Solution:- From the solution of previous question number of ways = 3612 (When kings are distinguishable) now in this question kings are...
🍪 We use cookies to improve your browsing experience, serve personalized ads and analyze our traffic. By clicking Accept All you consent to our use of cookies as described in our Privacy Policy.
