25 buses are running between two places P and Q. In how many ways can a person go from P to Q and return by a different bus?
He can go in any of the 25 buses [25 ways].
Since he cannot come back in the same bus, he can return in 24 ways.
Total number of ways =25×24=600
|
In how many ways a committee, consisting of 5 men and 6 women can be formed from 8 men and 10 women? |
Answer |
|
Find out the number of ways in which 6 rings of different types can be worn in 3 fingers? |
Answer |
|
A box contains 2 white balls, 3 black balls and 4 red balls. In how many ways can 3 balls be drawn from the box, if at least one black ball is to be included in the draw? |
Answer |
|
How many 3-digit numbers can be formed from the digits 2, 3, 5, 6, 7 and 9, which are divisible by 5 and none of the digits is repeated? |
Answer |
|
In how many ways can the letters of the word LEADER be arranged? |
Answer |
|
How many 6 digit telephone numbers can be formed if each number starts with 35 and no digit appears more than once? |
Answer |
|
An event manager has ten patterns of chairs and eight patterns of tables. In how many ways can he make a pair of table and chair? |
Answer |
|
How many 4-letter words with or without meaning, can be formed out of the letters of the word, LOGARITHMS, if repetition of letters is not allowed? |
Answer |
|
A box contains 4 red, 3 white and 2 blue balls. Three balls are drawn at random. Find out the number of ways of selecting the balls of different colours? |
Answer |
|
25 buses are running between two places P and Q. In how many ways can a person go from P to Q and return by a different bus? |
Answer |