A three-member committee has to be formed from a group of 9 people. How many such distinct committees can be formed?

Tower A is 90 m tall and tower B is 140 m tall. They are 100 m apart. A horizontal skywalk connects the floors at 70 m in both the towers. If a taut rope connects the top of tower A to the bottom of tower B, at what distance (in meters) from tower A will the rope intersect the skywalk?

Hema's age is 5 years more than twice Hari's age. Suresh's age is 13 years less than 10 times Hari's age. If Suresh is 3 times as old as Hema, how old is Hema?

The temperature T in a room varies as a function of the outside temperature T₀ and the number of persons in the room p, according to the relation $$T = K(\Theta p + {T_0})$$, where $$\Theta $$ and K are constants. What would be the value of $$\Theta $$ given the following data?