New post in Combinations

How many combinations out of 3 elements?

December 31st, 2022

A batsman can score 0,1,2,3,4 or 6 runs from a ball. the number of different sequences...

August 18th, 2022

How many three-digit numbers formed from the six digits $2$, $3$, $5$, $6$, $7$, and $9$ without repetition are multiples of 5?

December 16th, 2022

A computer password consists of a letter followed by 3 or 4 numbers. Find the total number of passwords that can be created.

October 25th, 2022

Could you please solve this problem?

August 15th, 2022

How many rectangles can be observed in the grid?

August 15th, 2022

Numbers greater than $1000$ can be formed from the digits $1,1,2,2,3$

July 22nd, 2022

How many $5$ letter arrangements can be made using the letters of the word INDEPENDENT?

August 1st, 2022

Number of ways for 7 people to be seated so that two particular ones are separated by 3

October 2nd, 2022

In how many ways can we draw 3 different cards from a deck of 52 cards, where the order in which cards are drawn doesn’t matter?

August 1st, 2022

A team won 80% of the games it played 5 more games of which it won 3 and lost 2. Its loss percentage changed to 25% how many games it play overall?

August 1st, 2022

Show that $(1+x)^n$ = .... Hence deduce that .... = $2^n$

August 21st, 2020

Combination question on forming a committee

August 1st, 2022

How often does 7 occur from number 1 to 1000?

January 2nd, 2020

how many 3 digit numbers can be formed with 2 consecutive same numbers

December 28th, 2020

What is the probability that a randomly chosen 3-digit integer is divisible by $5$?

August 1st, 2022

For how many natural numbers $a$ is the expression $\sqrt{\frac{a+64}{a-64}}$ also a natural number?

December 10th, 2020

Statistics Probability breathalyser test questions

January 31st, 2020

How many combinations are possible: English alphabet A-Z and digits 0-9 in a set of 12.

April 15th, 2020

How many 4 digit numbers can be formed by digits 3, 1, 3, 1?

August 1st, 2022

Exactly why coefficient of $x^ky^{n-k}$ is $C(k,n)$

July 27th, 2020

Forming 4-digit odd numbers under certain rules

August 1st, 2022

In how many ways can you choose three distinct numbers ....

July 22nd, 2020

What's the Probability of Drawing Exactly One Pair?

June 4th, 2020

Calculating the expected profit with Probability A level maths CIE

November 3rd, 2020

Dealing a 5 card hand with exactly 1 pair

November 15th, 2020

Programmatically getting list of combinations

March 11th, 2020

Permutation and Combinations (Separation)

July 8th, 2020

Programming: How do I find all possibilities of a combination?

August 1st, 2022

Box containing Red and black balls

August 1st, 2022