If p : girls are haapy, q : girls are playing, express the following sentences in symbolic form : (i) Either the girls are happy or they are not plyaing. (ii) Girls are unhappy but they are playing. (3) It is not true that the girls are not playing but they are happy.
The two stars in a certain binary star system move in circular orbits The first star alpha moves in an orbit of radius 1.00 xx 10^(9)km The other star beta moves in an orbit of radius 5.00 xx 10^(8)km What is the ratio of masses of star beta to the star alpha ? .
Three stars A,B,C have surface temperature T_A, T _B, T_C resp. Star A appears bluish star B appears reddish and star C yellowish . Hence
Statements:- All girls are foolish. No girl is smart. Conclusions:- I. Some smarts are girls. II. No foolish are smart.
Statements:- All teachers are students. No student is girl. Conclusions :- I. All girls are students. II. Some girls are student.
