Question
From 6 officers and 8 Jawans, in how many ways can 5 be
chosen to include exactly 3 officers?Solution
Required Number of ways = 6C3 × 8C2 = 6!/(3! ×3!)  ×  8!/(2! ×6!) = 20 × 28 = 560
How many seats are between P and O when counted from the left of O?
Some equations are solved on the basis of a certain system. Find the correct answer for the given equations on that basis:-
5 × 7 × 4 = 53
...- A swimmer decided to swim for 8 hours. He swims 8 laps in an hour. He takes a break of 20 minutes after every hour. How many laps does he complete in 8 hou...
Select the option that is related to the third number in the same way as the second number is related to first number and the sixth number is related t...
If all the letters in each of the words are arranged alphabetically (within the word), how many words will remain unchanged?
What will be the fourth step for the following input?
Input: 76 172 372 43 243 361 165
- The sides of a cuboid are in the ratio 1:2:4. If its volume is 1728 cm³, find the sum of its dimensions.
Select the option in which the numbers are related in the same way as are the numbers of the following sets. Â
(63, 7, 16)
(68, 4, 21)
If K and M interchanged their positions then how many seats are there between M and R?
Who among the following person is from the 8th standard?