If the percentage of Mathematics teachers is increased by 50% and the percentage of Hindi teachers decreased by 25%, then what will be the total number of Mathematics and Hindi teachers together?
459
New strength of Mathematics teachers = 234 + (12×13% of 1800=117)= 351
New strength of Hindi teachers = 34×8% of 1800=108
Collective strength of both subject teachers = 351 + 108 = 459