[TAGALOG] Conditional Permutation

***Don’t forget to subsribe****    / @phmathtutorials7768   ****Comment below guys kung meron kayong request na topic at gagawan natin ito ng video tutorials About me: Isa po akong Electrical Engineering Graduate at gusto ko maishare ang aking mga natutunan lalo na sa mga estudyanteng nahihirapan sa subject na mathematics. **ENJOY WATCHING!!!!** 1. There are 4 different Mathematics books and 5 different Science books. In how many ways can you arranged on a shelf if: a.) Books of the same subject must be placed together b.) If they must be placed alternately 2. Four couples want to have their pictures taken. In how many ways can they arrange themselves in a row if couples must stay together? 3. In how many ways can 6 students be seated in a row of 6 seats if 2 of the students insist on sitting beside each other?