In how many ways a team of 11 members can be formed from a group of 15 students if a students who is the owner of the ball is always considered a member of the team?

At the beginning of a class period, half of the students in a class go to the library. Later in the period, ha...

The dimensions of a box are 2, 3 and 4 meters. The cost of painting the outer sides of the box at the rate of...

A coin is tossed twice. What is the probability of getting head on first toss and tail on second toss?

The average of eight numbers in 14. The average of six of these numbers 16. The average of the remaining two n...

A motorist travels to a place 150 km away at an average speed of 50 km and returns at 30 km per hour. His aver...

If x : y = 5 : 3, then 8x - 5y : 8x + 5y =?