Practising NCR in Combinations in Probability

Determine the value of n and r

3. A man will go on a trip for 3 days, so he will take with him 3 shirts, if he has 7 shirts, how many combination of shirts can he take?

3. A man will go on a trip for 3 days, so he will take with him 3 shirts, if he has 7 shirts, how many combination of shirts can he take?

• C = 35

• C = 84

In a bucket there are 10 balls, every ball is numbered from 1 to 10, if somebody pulls out 3 of this balls randomly, how many combination of could he take.

• With Repetition

• No Repetition

In a bucket there are 10 balls, every ball is numbered from 1 to 10, if somebody pulls out 3 of this balls randomly, how many combination of could he take.

In a bucket there are 10 balls, every ball is numbered from 1 to 10, if somebody pulls out 3 of this balls randomly, how many combination of could he take.

• C = 120

• C = 220

Determine the value of n and r

5. A sportsman goes to the store to buy 4 pairs of shoes, if at the store there are a lot of shoes in 7 available colors, how many combination of colors can this man buy.

5. A sportsman goes to the store to buy 4 pairs of shoes, if at the store there are a lot of shoes in 7 available colors, how many combination of colors can this man buy.

• C = 35

• C = 210

Picking a team of 3 people from a group of 10.

• Combination

• Permutation

Choosing 3 desserts from a menu of 10.

• Combination

• Permutation

A team of 5 people to be selected out of 4 women and 7 men. In how many different ways this can be done if there is no restriction?

• 462

• 5/11

• 11/5

• 55440