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Numerical Ability
Permutation and Combination
A team of 8 students goes on an excursion, in two cars, of which one can seat 5 and the other only 4. In how many ways can they travel?
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- They can travel 4+4 or 5+3 in 2 cars.
8c4 + 8c5 = 70+56 = 126 ways - 13 years agoHelpfull: Yes(18) No(6)
- There are 8 students and the maximum capacity of the cars together is 9.
We may divide the 8 students as follows
Case I: 5 students in the first car and 3 in the second
Or Case II: 4 students in the first car and 4 in the second
Hence, in Case I: 8 students are divided into groups of 5 and 3 in 8C3 ways.
Similarly, in Case II: 8 students are divided into two groups of 4 and 4 in 8C4 ways.
Therefore, the total number of ways in which 8 students can travel is 8C3 + 8C4 = 56 + 70 = 126. - 12 years agoHelpfull: Yes(18) No(4)
- total no of ways=8c5*8c3+8c4*8c4
- 12 years agoHelpfull: Yes(6) No(14)
- Ans= 126 ways
- 9 years agoHelpfull: Yes(1) No(2)
- hello mr.sumit gupta,
i am at big confusion after looking this problem.could you please explain me clearly - 10 years agoHelpfull: Yes(0) No(0)
- hi friends can any one please explain me the solution.
thanks in advance. - 9 years agoHelpfull: Yes(0) No(0)
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