The number of way a person roundtrip by bus from A to C by way of B will be
| A. | 12 |
| B. | 48 |
| C. | 144 |
| D. | 264 |
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Option: C Explanation :
There are twelve ways to go from A to C by way of B, and 12 ways to return. Click on Discuss to view users comments. |
The number of diagonals that can be drawn by joining the vertices of an octagon is
| A. | 28 |
| B. | 48 |
| C. | 20 |
| D. | None of these |
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Option: C Explanation : Click on Discuss to view users comments. |
The number of ways in which a team of eleven players can be selected from 22 players including 2 of them and excluding 4 of them is
| A. | 16C11 |
| B. | 16C5 |
| C. | 16C9 |
| D. | 20C9 |
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Option: C Explanation : Click on Discuss to view users comments. |
How many 10 digits numbers can be written by using the digits 1 and 2 ?
| A. | 10C1+9C2 |
| B. | 210 |
| C. | 10C2 |
| D. | 10 ! |
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Option: B Explanation : Click on Discuss to view users comments. |
In an examination there are three multiple choice questions and each question has 4 choices. Number of ways in which a student can fail to get all answers correct is
| A. | 11 |
| B. | 12 |
| C. | 27 |
| D. | 63 |
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Option: D Explanation : Click on Discuss to view users comments. Aditya said: (1:50am on Tuesday 29th January 2013)
No.of ways of attempting 1st,2nd,3rd questions are each.Total no.of ways=4.4.4=64No.of ways to getting all correct answers=1.1.1=1therefore,No.of ways of not getting all answers correct=64-1=63
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