in a certain neighborhood , 60 percent of the student are going to school ( a ) , and the rest are going to school ( b ) . a new school ( c ) is opened , if 30 percent of student of school ( a ) and 40 percent of student of school ( b ) are expected to go to the new school ( c ) , what percent of student are expected to go to the new school ( c ) ?
say there are total of 100 students in the neighborhood , 60 students are going to school ( a ) and 40 student are going to school ( b ) 60 * 0.3 = 18 student of school ( a ) are expected to go to the new school ( c ) 40 * 0.4 = 16 student of school ( b ) are expected to go to the new school ( c ) thus total of 18 + 16 = 34 student are expected to go to the new school ( c ) , which is 34 % of students . answer : b .
add(multiply(divide(30, const_100), 60), multiply(divide(40, const_100), subtract(const_100, 60)))