MCQ 11 MarkIf $10x$ $n! = 240$ then find the value of $n$.A$6$B$3$C$5$✓$4$AnswerCorrect option: D. $4$View full question & answer→
MCQ 21 MarkHow many terms are there in the expansion of $(x+a)^{n-1}$ ?✓$n$B$n-2$C$n+1$D$n+2$AnswerCorrect option: A. $n$View full question & answer→
MCQ 31 MarkIf $(n+ 1)! = 120$ then find the value of $n$.A$3$✓$4$C$5$D$6$AnswerCorrect option: B. $4$View full question & answer→
MCQ 41 MarkFind the value of ${ }^{ n } C _{ 0 }+{ }^n C _{ n }.....$A $0$B$1$✓$2$D$2n$ AnswerCorrect option: C. $2$View full question & answer→
MCQ 51 MarkWhich of the following is equivalent to ${ }^{ n } C _{ r } ?$A$\frac{ n !}{( n - r )!}$✓${ }^{ n } C_{n-r}$C$^{ n } C_{r-1}$D$ \frac{ n C_{r+1}}{ r }$AnswerCorrect option: B. ${ }^{ n } C_{n-r}$View full question & answer→
MCQ 61 MarkIn usual notations, which of the following relation between permutation and combination is true ?A$ { }^n C_r={ }^n P_r Xr$ !B$ { }^n P_r={ }^n C_r+r!$C$ { }^n P_r=\frac{n C_r}{r!}$✓$ { }^n C_r=\frac{n P_r}{r!}$AnswerCorrect option: D. $ { }^n C_r=\frac{n P_r}{r!}$View full question & answer→
MCQ 71 MarkWhat is $n!$ ?AMultiplication of $0$ to $n$ natural numbersBMultiplication of $1$ to $n - r$ natural numbers✓Multiplication of $1$ to $n$ natural numbersDMultiplication of $1$ to $n$ natural numbersAnswerCorrect option: C. Multiplication of $1$ to $n$ natural numbersView full question & answer→
MCQ 81 MarkIf the first action can be done in $m$ ways and second action can be done in $n$ ways then in how many ways can both the actions be done together?✓$ m n$B$\frac{m}{n}$C$m-n$D$m+n$AnswerCorrect option: A. $ m n$View full question & answer→
MCQ 91 MarkA ride in a fun fair has $8$ seats. In how many ways can $3$ persons be arranged in this ride ?A$ { }^{8} C_{3} $B$ { }^{3} P_{8} $C$ { }^{3} C_{8} $✓$ { }^{8} P_{3} $AnswerCorrect option: D. $ { }^{8} P_{3} $View full question & answer→
MCQ 101 MarkState the last term in the expansion of $(x+a)^n$.✓$a^n$B$a^{n-1}$C$x^0$D$x^{n-1}$AnswerCorrect option: A. $a^n$View full question & answer→
MCQ 111 MarkIn one $A$ group there are $m$ distinct things and in the other group there are $n$ distinct things. In how many ways can one things be selected from both the groups ?A$mn$B$\frac{m}{n} $C$m – n$✓$m + n$AnswerCorrect option: D. $m + n$View full question & answer→