HSC Science Class 11 - Tamil Nadu Board of Secondary Education Question Bank Solutions

How many three-digit numbers, which are divisible by 5, can be formed using the digits 0, 1, 2, 3, 4, 5 if repetition of digits are not allowed?

How many three-digit numbers, which are divisible by 5, can be formed using the digits 0, 1, 2, 3, 4, 5 if repetition of digits are allowed?

To travel from a place A to place B, there are two different bus routes B₁, B₂, two different train routes T₁, T₂ and one air route A₁. From place B to place C there is one bus route say B₁, two different train routes say T₁, T₂ and one air route A₁. Find the number of routes of commuting from place A to place C via place B without using similar mode of transportation

How many numbers are there between 1 and 1000 (both inclusive) which are divisible neither by 2 nor by 5?

How many strings can be formed using the letters of the word LOTUS if the word either starts with L or ends with S?

How many strings can be formed using the letters of the word LOTUS if the word neither starts with L nor ends with S?

Count the total number of ways of answering 6 objective type questions, each question having 4 choices

In how many ways 10 pigeons can be placed in 3 different pigeon holes?

Find the number of ways of distributing 12 distinct prizes to 10 students?

Find the value of 6!

Find the value of 4! + 5!

Find the value of 3! – 2!

Find the value of 3! × 2!

Find the value of `(12!)/(9! xx 3!)`

Find the value of `(("n" + 3)!)/(("n" + 1)!)`

Evaluate `("n"!)/("r"!("n" - "r")!)` when n = 6, r = 2

Evaluate `("n"!)/("r"!("n" - "r")!)` when n = 10, r = 3

Evaluate `("n"!)/("r"!("n" - "r")!)` when for any n with r = 2

Find the value of n if (n + 1)! = 20(n − 1)!

Find the value of n if `1/(8!) + 1/(9!) = "n"/(10!)`