Mathematics questions
18011 published questions with worked solutions.
- From 12 books, the difference between number of ways a selection of 5 books when one specified book is always excluded and one...
- The number of ways of distributing 8 identical balls in 3 distinct boxes, so that none of the boxes is empty, is
- Three straight lines L_1,L_2,L_3 are parallel and lie in the same plane. A total of m points are taken on L_1, n points on L_2, k...
- If ^ n-1 C_3+ ^ n-1 C_4> ^nC_3, then n is just greater than integer
- If ^ 189 C_ 35 + ^ 189 C_x= ^ 190 C_x, then x is equal to
- The number of selecting at least 4 candidates from 8 candidates is
- In a club election the number of contestants is one more than the number of maximum candidates for which a voter can vote. If the...
- A student is to answer 10 out of 13 questions in an examination such that he must choose at least 4 from the first five...
- There are 5 roads leading to a town from a village. The number of different ways in which a village can go to the town and return...
- A father with 8 children takes 3 at a time to the zoological garden, as often as he can without taking the same 3 children...
- In a cricket championship there are 36 matches. The number of terms, if each plays 1 match with other are
- If S_n= _ r=0 ^n 1 ^nC_r and t_n= _ r=0 ^n r ^nC_r , then t_n s_n is equal to
- _ r=0 ^m ^ n+r C_n is equal to
- From 6 different novels and 3 different dictionaries, 4 novels and 1 dictionary are to be selected and arranged in a row on the...
- If m= ^nC_2, then ^mC_2 is equal to
- The set S= 1,2,3, ,12 is to be partitioned into three sets A,B,C of equal size. Thus, A B C=S and A B=B C=A C= . The number of...
- Out of 6 boys and 4 girls, a group of 7 is to be formed. In how many ways can this be done, if the group is to have a majority of...
- If ^nC_r denotes the number of combinations of n things takes r at a time, then the expression ^nC_ r+1 + ^nC_ r-1 +2 ^nC_r,...
- There are 5 letters and 5 different envelopes. The number of ways in which all the letters can be put in wrong envelope, is
- The number of four-letter words that can be formed (the words need not be meaningful) using the letters of the word MEDITERRANEAN...